What is the mean of 70, 75, 80, 85, and 90?

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Solution

The correct option is A
80

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Similar questions

Q. 9.Find the mean, variance and standard deviation using short-cut methodHeight 70-75 75-80 80-85 85-90 90-95 95-100 100-105 105-110 110-115in cmsNo. of 3 4 7 7children15 96

Q. Find the median of the following data.

Maths marks	$60 - 65$	$65 - 70$	$70 - 75$	$75 - 80$	$80 - 85$	$85 - 90$	$90 - 95$
No. of students	$8$	$12$	$14$	$8$	$5$	$6$	$4$

Q. The following table given the weekly wages (in Rs.) of workers in a factory:

Weekly wages (in Rs.)	$50 - 55$	$55 - 60$	$60 - 65$	$65 - 70$	$70 - 75$	$75 - 80$	$80 - 85$	$85 - 90$
No. of workers	$5$	$20$	$10$	$10$	$9$	$6$	$12$	$8$

Calculate:
The mean.

Find the mean, variance and standard deviation using short-cut method

$\begin{matrix} Height in cm & 70 - 75 & 75 - 80 & 80 - 85 & 85 - 90 & 90 - 95 & 95 - 100 & 100 - 105 & 105 - 110 & 110 - 115 No. of children & 3 & 4 & 7 & 7 & 15 & 9 & 6 & 6 & 3 \end{matrix}$

Find the mean of the following using step deviation method.

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What is the mean of 70, 75, 80, 85, and 90?

The correct option is A 80

The correct option is A
80