Question

Yousif bought 20 calculators at the electronics store. 40% of the calculators were scientific calculators and 1/2 of the calculators were graphing calculators. How many of the calculators were neither scientific calculators nor graphing calculators

Answer 1

Explanation:

If Yousif bought 20 calculators, then:

40% of the calculators were scientific calculators, which means Yousif bought 0.4 * 20 = 8 scientific calculators.

1/2 of the calculators were graphing calculators, which means Yousif bought 0.5 * 20 = 10 graphing calculators.

To find out how many of the calculators were neither scientific calculators nor graphing calculators, we need to subtract the number of scientific and graphing calculators from the total number of calculators:

20 - 8 - 10 = 2

Therefore, Yousif bought 2 calculators that were neither scientific calculators nor graphing calculators.

Answer 2

the number of calculators that are neither scientific nor graphing is 20 - 18 = 2. So Yousif bought 2 calculators that were neither scientific calculators nor graphing calculators.

Explanation:

If Yousif bought 20 calculators, then the number of scientific calculators he bought is 40% of 20, which is (40/100) * 20 = 8.

The number of graphing calculators Yousif bought is half of 20, which is 20/2 = 10.

The number of calculators that are either scientific or graphing is the sum of the number of scientific calculators and the number of graphing calculators, which is 8 + 10 = 18.

Therefore, the number of calculators that are neither scientific nor graphing is 20 - 18 = 2. So Yousif bought 2 calculators that were neither scientific calculators nor graphing calculators.