Answer B.
∑fx=1637,∑fx
2
=127663,∑f=21
x
ˉ
=Mean=
∑t
∑fx
=77.95
σ
2
=
∑f
∑fx
2
−(
x
ˉ
)
2
=
21
127663
−(77.95)
2
=2.987
σ=1.728
The answers is A
Explanation ;)
The answer is C
just factor every option and you will find the answer
A. It would be 1,855 but you also have to add in the pages she read on the first night I got my answer by (35*53)+77.
