Aamir W.

asked • 10/15/17

It's statistics and probability related question.

a) A survey of park showed an average expenditure of Rs. 10.30. If for 20 girls the average expenditure was Rs.9.70 and Rs. 11.1 for the boys. Find the number of boys.
b) A computer calculated a mean of 42 from 20 observations. It was later discovered at the time of checking that he had copied down values as 45 and 38, where as the correct values were 35 and 58.Find the correct value of mean.

1 Expert Answer

By:

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.