Question

one is asked to say a two- digit number
a) how many two digit number are there?
b) what is the probability of getting a multiple of 5?
c) what is the probability of getting multiple of 10?
d) what is the probability of one of the digit being zero and the other being a prime?​

Answer 1

Answer:

how many 2-digits numbers?

Step-by-step explanation:

largest number of 2 digit = 99

Smallest number of 2 digit= 10

difference is 99 - 10 =89

total number of 2-digit numbers are 89 + 1 = 90

Answer 2

Answer:

a) 90

b) 17 / 90

c) 1 / 10

d) 2 / 45

Step-by-step explanation:

a) There are a total of 90 two-digit numbers.

b) Total no. of two-digit numbers which are multiple of 5 = 17

∴ P(E) = 17 / 90

c) Total no. of two-digit numbers which are multiple of 10 = 9

∴ P(E) = 9 / 90 = 1 / 10

d) Total no. of two-digit numbers in which one of the digit is zero and the other is a prime = 4

∴ P(E) = 4 / 90 = 2 / 45