Question

There are 30 cards of same size in a bag on which no. 1to30 are written , one card is taken out of the bag at random. Find the probability that the no on the selected card is not divisible by 3

Answer 1

Step-by-step explanation:

no. not divisible by three :A={1,2,4,5,7,8,10,11,13,14,16,17,19,20,22,23,25,26,28,29.}

it's a event

therefore

p(a)=n(a)/n(s)

=20/30

2/3 is the answer