To receive Grade ‘A’ in a course, one must obtain an average of 90 marks ormore in five examinations (each of 100 marks). If Sunita’s marks in first fourexaminations are 87, 92, 94 and 95, find minimum marks that Sunita must obtain in fifth examination to get grade ‘A’ in the course.

Q: My teacher says we have to round up so the lower class limit would be 20 instead of 17?

A: The above data set,  17,26,19,19,18,21,21,30,19,18,20,22,18,19,18,22,19,23,19,20,20,25,18,20,22,19…

Q: A pianist plans to play 6 pieces at a recital from her repertoire of 24 pieces. How many different…

A: Given data A pianist plans to play 6 pieces at a recital from her repertoire of 24 pieces

Q: There are 4 bone-in prime rib cuts in each 109 beef loin and 5 bone-in prime rib cuts in each export…

A: Given: There are 4 bone-in prime rib cuts in each 109 beef loin and 5 bone-in prime rib cuts in each…

Q: If the sum of n even natural number is 420,find the value of n

A:

Q: Find the number of ways to distribute 12 people into 3 classrooms, empty classrooms are allowed.

A: Find the number of ways to distribute 12 people into 3 classrooms, empty classrooms are allowed.

Q: Of 16 possible​ books, you plan to take 3 with you on vacation. How many different collections of 3…

A: See the handwritten solution

Q: In a class of 50 students, 10 have failed and their average of marks is 2 5. The total narks secured…

A: Given: total 50 students 10 failed students average of failed students is 2.5 total marks 281

Q: The class consist of 50 students of which 35 are boys and remaining are girls. The average marks of…

A: Given that, Total =50 No.of boys =35 No.of girls=15 Average marks .of boys =45 Average marks .of…

Q: There were 3-wheel ATV’s and 4-wheel ATV’s at the fall of road exhibition. Justin counted a total of…

A: Make linear equations in two variables accordingly to the question.

Q: Two groups are running a race. The first group is made up of 6 students and the second group is made…

A: group 1 n1 = 6x1= 521.4 secondsgroup 2n2 = 8x2 = 502.6 secondsfinal average = ?

Q: Initially, there are 400 bacteria and after 9 hours, 900 bacteria are observed in the culture. Find…

A:

Q: A pianist plans to play 5 pieces at a recital from her repertoire of 22 pieces. How many different…

A: Permutation formula: nPr = n!/(n-r)!

Q: Two groups are running a race. The first group is made up of 6 students and the second group is made…

A: group 1 n1 = 6x1 = 521.4group 2n2 = 8x2 = 502.6find average (x) = ?

Q: An instructor has graded 23 exam papers submitted by students in a class of 24 students, and the…

A:

Q: How many pairs to sum an even number or one greater than 9?

A: Please see the below picture for detailed solution.

Q: The average score of lovelyn in 6 math quizzes is 19. If she will not include her lowest score, her…

A: Let her lowest score be x and the other scores be a,b,c,d,e.

Q: In a competition, there are 200 participants. Points were distributed as such that each participant…

A: Given that there are 200 participants in a competition. The winner got 2400 points Point is…

Q: Nick and his team collected tanned and released 27 deer several days later the teams return to the…

A: Let 'x' be the total population of deer. Now from given data we form equations in ratio form. ratio…

Q: An instructor has graded 23 exam papers submitted by students in a class of 24 students, and the…

A: Given An instructor has graded 23 exam papers submitted by students in a class of 24 students, and…

Q: please explain using the formula  How many ways are there to distribute 7 cookies to 4 kids so that…

A: We have to find the no.of ways are there to distribute 7 cookies to 4 kids so that each kid gets at…

Q: the stanford womens basketball team made 45 field goals in a recent game; some were 2-pointers and…

A: We will construct a system of linear equations according to the given conditions to get the required…

Q: The class includes 15 male and 20 female students. We need to assign 5 students per group for senior…

A: The objective of this question is to find out the number of ways to divide a class of 35 students…

Q: Vrishna worked 43 hours in 7 days. hours clid How many sthe work gach day? equetion. unte an

A: Solution : Given that Kristina worked  43 hours in 7 days   43/7 = 6.1428571 hours  She worked…

Q: ianist plans to play 6 pieces at a recital from her repertoire of 26 pieces.  How many different…

A: Total number of pieces available (n) = 26 pieces. Number of pieces (r) which a pianist needs to play…

Q: the sum of the ages of Juman ans Nina is 112 years ago. 6 years ago, Juwan age was 4 time Nina's…

A: Using given information we will solve the question.

Q: he number of chickens and goats in a field totals 40. The total number of legs among them is 102.…

A: Given: Total chickens and goats in field =40 Total legs = 102 Solution: Now let us assume, Number of…

Q: A theater has 30 seats in the first row, 32 seats in the second row, in- creasing by 2 seats each row…

A: Total number of rows = 26Increment in each row = 2So, starting from the first row, we have 30 seats,…

Q: There are a total of 165 students in 7th grade. 33 of those students chose to be fully virtual. What…

A: To find out the percentage of students who are fully virtual.

Q: A pianist plans to play 4 pieces at a recital from her repertoire of 25 pieces. How many different…

A: Given : No. of repertoire pieces = 25 A pianist plans to play 4 pieces i.e n = 4

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.