Rahul's mean score in $5$ tests was $84$ . His mean score in the first $4$ of these tests was $87$ . Calculate his score in the fifth test.

68

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72

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75

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81

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96

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Solution

The correct option is A $72$
Given, Rahul"s mean score in $5$ test was $84$ .
And his means score in the first $4$ test of these test was $87$ .
Then total score in $5$ tests $=$ $84 \times 5 = 420$
And total score in $4$ tests $=$ $87 \times 4 = 348$
So, the score in fifth test $= 420 - 348 = 72$ .

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Rahul's mean score in 5 tests was 84. His mean score in the first 4 of these tests was 87. Calculate his score in the fifth test.

The correct option is A 72Given, Rahul"s mean score in 5 test was 84.And his means score in the first 4 test of these test was 87.Then total score in 5 tests = 84×5=420And total score in 4 tests = 87×4=348So, the score in fifth test =420−348=72.

Rahul's mean score in $5$ tests was $84$ . His mean score in the first $4$ of these tests was $87$ . Calculate his score in the fifth test.