Question

A two digit number is selected at random. Find the probability that it is a multiple of 7.
A) 11/90
B) 13/90
C) 7/45
D) 8/45
E) None of these

Answer 1

Your answer is

B) 13/90

as total 2-digit no. multiple of 7 is 13
and total 2-digit no. are 90.

so the probability is 13/90

HOPE YOU UNDERSTAND IT

PLEASE MARK AS BRAINLIEST..

Answer 2

☆Total two digit numbers is from 10-99 is 90

No. of multiple of 7 from 1 to 100 is
7,14,21,28,35,42,49,56,63,70,77,84,91,98.

Two digit multiples are 14,21,28,35,42,49,56,63,70,77,84,91,98

➡️Total no. of two digit multiple of 7 is 13.

$probability = \frac{no. \: of \: outomes}{total \: no. \: of \: oucomes} \\ = \frac{13}{90}$

$\mathbb{Option\: B \:is\: correct}$