a book contains 92 pages a page is chosen at random what is the prob

1.	a book contains 92 pages a page is chosen at random what is the probability that the sum of digits in the number is 9 ?
Answer» Number of pages of the book = 92 Which are from 1 to 92 Number of possible outcomes = 92 ∴ Number of pages whose sum of its page is 9 = 10 i.e. 9, 18, 27, 36, 45, 54, 63, 72, 81, 90 P(E) = 10/92 = 5/46

a book contains 92 pages a page is chosen at random what is the probability that the sum of digits in the number is 9 ?

Answer»

Number of pages of the book = 92

Which are from 1 to 92

Number of possible outcomes = 92

∴ Number of pages whose sum of its page is 9 = 10

i.e. 9, 18, 27, 36, 45, 54, 63, 72, 81, 90

P(E) = 10/92 = 5/46