Steve bought a total of 6 packages of pens, and each package contained either 3 or 7 pens. If exactly 4 of the packages Steve bought a package that contained 7 pens, how many pens did Steve buy?

A) 21

B) 28

C) 30

D) 34

E) 42

The answer is D.

Calculate how many pens he bought for only the bags with 7 pens each. You get 28.

Next, since you know there are 2 bags left that each must have 3 pens only, calculate how many pens he bought in only those 2 bags. You get 6.

Add the 2 values. 28+6 is 34, so your answer is choice D.

The answer is D, 34

If 4 of the packages contain 7 pens, that means there, 28 pens are total.

Because they contained either 3 or 7 pens, I would assume the remaining 2 packages of 6 total that Steve had bought would have to have 3 pens.

3*2 is equal to 6

28 + 6 = 34