The numbers 2-12 are written on cards and placed in the bag.what is the probability of picking an even number then replacing it

Question

3 years ago

9

and then picking a 7?

1 answer:

weeeeeb [17] · Answer 1 · 2022-01-23T18:17:02+03:00

2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12

There are 11 numbers on cards.

6 cards contain even numbers.

Answer: p(even) = 6/11

There is only one card with a 7. After the first card is picked and returned, there are 11 cards in the bag again.

p(even then 7) = p(even) * p(7) = 6/11 * 1/11 = 6/121

Answer: p(even then 7) = 6/121