Question

Cards marked with numbers 3 to 101 are placed in a box . one card is drawn from the box .find the probablity (1)exactly divisible by 2 and 5 (2)a perfect sqare

Answer 1

here is your answer buddy
n(s)=101-2
=99
let a be an event of getting exactly a number card divisible by 2 and 5
A={10,20,30,30,50,60,70,80,90}
n(A)=9
p(A)=9/99

let B be an event of getting a perfect square
B={4,9,16,25,36,49,64,81}
n(B)=8
p(B)=8/99
is it right!!!?