Question

in a school numbers of student present on Monday to Thursday are 725 635 735 and 625 respectively if average given for five successive days is 700 find the number of students present on Friday

Answer 1

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${\huge{\underline{\underline{\mathfrak{\purple{given:-}}}}}}$

Number of students present from Monday to Thursday: 725, 635, 735, 625.

${\huge{\underline{\underline{\mathfrak{\pink{to \: find:-}}}}}}$

Number of students present on Friday.

${\huge{\underline{\underline{\mathfrak{\blue{solution:-}}}}}}$

Let the number of students present on Friday be x.

Now,

2720 + x/5 = 700

x = 3500 - 2720

x = 780

Therefore:- the number of students present on Friday is 780.

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❤️Inshaan69❤️

Answer 2

The number of students present on Friday is 780.

Given: The number of students present on Monday to Thursday is 725, 635, 735, and 625 respectively.

The average given for five successive days is 700.

To Find: The number of students present on Friday

Solution:

We can solve the sum by applying the concept of average which says,

The average number of students = Total number of students / Number of days

Let the number of students present on Friday be x.

The sum of number of students present on 4 days =  725+635+735+625

                                                                                       = 2720

The average for five days = 700

So, framing an equation according to the conditions given, we get;

The average number of students = Total number of students / Number of days

    ( 2720 + x ) / 5 = 700

 ⇒ x = 3500 - 2720

 ⇒ x = 780

Hence, the number of students present on Friday is 780.

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