# Question 13 , 14 & 15

Question 13: Calculate value of 'y' if mean of terms 10, 30 and y is 50.

FPSC AD IB 2017 -2nd batch

 (adsbygoogle = window.adsbygoogle || []).push({});

Solution:

Formula for calculating mean is;

Mean = Sum of terms/number of terms

so mean of 10. 30. y and 50 is

but mean is 50, so this term should be equal to 50;

Question 14: In 30 minutes a boy can type 1350 words, how many he will type 5  minutes?

FPSC AD IB 2017 -2nd batch

Solution:

This is very simple unit formula problem;

So he can type 225 words in 5 minutes

Question 15: Square's perimeter is 20, how long is one side?

FPSC AD IB 2017 -2nd batch

Solution:

Perimeter is the sum of all sides of a shape.

A square has four sides and all sides are equal, so, if one side is of 'x' length then;

but;

so,

So one side is 5 !

•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
All original content on these pages is fingerprinted and certified by Digiprove
Insert math as
$${}$$