Grade8-1149192-3-7136.q

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The Chinese University of Hong Kong *

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Statistics

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Nov 24, 2024

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ID : U-1149192-3-7136 (yolohighup@yahoo.com) [1] Copyright 2022 www.edugain.com Personal use only. Commercial use is strictly prohibited. Grade 8 Data Handling-Probability Statistics For more such worksheets visit www.edugain.com Choose correct answer(s) from the given choices (1) Three coins are tossed simultaneously times and it is found that three heads appeared times, two heads appeared times, one head appeared times and no head appeared times. If three coins are tossed simultaneously at random, what is the probability of getting ? a. b. c. d. (2) The letters of the word MATHEMATICS are rearranged in a random order. What is the probability that the letters H and S have exactly 3 letters between them? a. 1 b. 14 110 c. 9 105 d. 12 120 Answer the questions (3) In 2008, the meteorological office predicted the weathers completely right for the months of february and april, and completely wrong for all the other months. What is the probability that the forecast was right for a given day that year? (4) There are a total of 9 chocolates - 3 each in the flavors of cherry, orange and banana. There are also 4 children. If each child is allowed to choose their own favorite flavor, what is the probability that all of them will get flavors of their choice? (5) There are 44 employees in an insurance company working in three shifts. The first group of 19 employees work from 10:00 AM to 01:00 PM. The second group of 15 employees work from 12:00 PM to 03:00 PM. The third group of 10 employees work from 01:00 PM to 03:00 PM. If there are only 10 computers available, find the time during which the computers are likely to be used the most?

ID : U-1149192-3-7136 (yolohighup@yahoo.com) [2] Copyright 2022 www.edugain.com Personal use only. Commercial use is strictly prohibited. (6) A group of students from an Australian school are selected for a study. The color of the eyes of the students are noted as below: Color of Eyes Number of Students grey 7 green 3 black 10 brown 8 blue 2 What is the probability that the color of a student's eyes, chosen randomly, is black? (7) It is Sharon's birthday today and she distributed toffees to her classmates. The toffees were in a bag as shown below. Sharon's puts her hand in the bag and takes out a toffee without looking. What is the probability that she picked out a plain toffee? (8) From a deck of cards, Patricia withdrew a card randomly. What is the probability that the number on the card is a prime number? (9) If you toss a coin 5 times, what is the probability of getting exactly one head? (10) Joseph draws cards out of a deck of cards. What is the probability that he draws ? © 2022 Edugain (www.edugain.com). All Rights Reserved Many more such worksheets can be generated at www.edugain.com

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