Question

Two different numbers are picked up from 1 to 20, what is the probability that both are odd

numbers?​

Answer 1

odd no.s - 1,3,5,7,9,11,13,15,17,19=10 no.s

even no.s-2,4,6,8,10,12,14,16,18,20= 10 no.s

p(getting 1 oddno.s)=10/20=1/2

p(gettin 2)=200/400=1/2