Question

A group of store managers must assemble 280 displays for an upcoming sale. If they assemble 25 percent of the displays during the first hour and 40 percent of the remaining displays during the second hour, how many of the displays will not have been assembled by the end of the second hour?(A) 70(B) 98(C) 126(D) 168(E) 182

Answer 1

Option C: 126

Explanation:

Total displays to be assembled = 280

25% of the displays are assembled during the first hour, this value becomes:

`0.25*280=70`

Remaining displays =
`280-70=210`

40% of the remaining displays during the second hour, the value becomes:

`0.40*210=84`

Hence, number of displays that will not have been assembled by the end of the second hour =
`210-84=126`

Therefore, the answer is 126.