How many different passwords are there that contain only digits and lower-case letters and satisfy the given restrictions? (iii) Length is 7 and the password must contain at least one digit. (iv) Length is 7 and the password must contain at least one digit and at least one letter.
Percentage
A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.
Algebraic Expressions
In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
Numbers
Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.
Subtraction
Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.
Addition
Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.
Please answer questions 3 and 4.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
