Arun scored 36 marks in English, 44 marks in Hindi, 75 marks mathematics and x marks in science. If his average marks is 50, find the value of x.

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Solution

The correct option is D
45

There are 4 subjects, hence, $n = 4$

Average = 50, $\Rightarrow$ total marks = $50 \times 4 = 200$

$∴$ $36 + 44 + 75 + x = 200$

$\Rightarrow$ $155 + x = 200$

$\Rightarrow x = 45$

Arun secured 45 marks in science.

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Arun scored 36 marks in English, 44 marks in Hindi, 75 marks mathematics and x marks in science. If his average marks is 50, find the value of x.

The correct option is D 45 There are 4 subjects, hence, n=4 Average = 50, ⇒ total marks = 50 × 4 = 200 ∴ 36+44+75+x = 200 ⇒ 155+x = 200 ⇒x=45 Arun secured 45 marks in science.

The correct option is D
45

There are 4 subjects, hence, $n = 4$

Average = 50, $\Rightarrow$ total marks = $50 \times 4 = 200$

$∴$ $36 + 44 + 75 + x = 200$

$\Rightarrow$ $155 + x = 200$

$\Rightarrow x = 45$

Arun secured 45 marks in science.