Answered

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b) The average of the marks obtained by Abdul and Mariya in Maths is 56.
If the marks obtained by Hari is also included, the average is 60. Find the
marks obtained by Hari.


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Sagot :

olumideolawoyin

Answer:

68

Step-by-step explanation:

The average of the marks obtained by Abdul and Mariya in Maths is 56.

Average mark = Summation of their two marks / their number

56 = Summation of their two marks / 2

Summation of their marks = 2 × 56 = 112.

If the marks obtained by Hari is included, let Hari' s mark be x then

New average mark = Summation of their three marks / 3

New average mark = (Summation of their two marks + x) / 3

60 = (112 + x) / 3

112 + x = 60 × 3

112 + x = 180 Add -112 to both sides

x = 180 - 112

x = 68

Therefore, the mark obtained by Hari is 68.

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