Probability question

Question

A pencil case contains 7 blue pens 9 red pens 6 pencils 7 red crayons and 8 green crayons.

if you were to make 35 picks of an item at random, how many times can you expect to find each of the following: a.) a pencil b.) a pen

round the decimal to 2 spaces only

Answer 1

There are 37 items. Assuming replacement, the probability of picking a pencil is neither 6/35 nor 6/37, for certain; while the probability of selecting a pen is neither 16/35 nor 16/37, for certain. This is because in making available 35 selections, there are two selections not made. For all we know, the two extra could be pens, pencils, or crayons.