Question

The weekly wages of 1000 workmen are normally distributed around a mean of Rs 70 and with a standard deviation of Rs 5. Estimate the number of those workers whose weekly wages will be,
(1) between Rs 70 and Rs 72.
(2) Between Rs 69 and Rs 72.
(3) More then Rs 75.
(4) Less than Rs 63.
(5) More than Rs 80.
Also estimate the lowest weekly wages of the 100 highest paid workers.

Answer 1

1500 and 1500 gets cancel...
then 200/625 then solve is...

Answer 2

0.32 is the final solution....

Answer 3

200/625

Answer 4

Yes you are correct 200/625....
Do you want more explanation...?

Answer 5

yes

Answer 6

According to BODMS rule...
first division is performed....then multiplication is performed...