Multiple choice

The given table shows Maria's marks in five different subjects. | English | 40 | | --- | --- | | Science | 45 | | History | 43 | | Maths | 42 | | French | x | How much did she score in French if her average marks in the above given five subjects are 42?

  1. 42

  2. 40

  3. 38

  4. 36
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B Correct answer
Explanation

Sum of marks = 40 + 45 + 43 + 42 + x = 170 + x. Average = (170 + x) / 5 = 42. 170 + x = 210. x = 40.

AI explanation

Using the average formula, the sum of all five marks equals the average multiplied by the number of subjects, which is 42 times 5, or 210. The sum of the known marks is 40 plus 45 plus 43 plus 42, which equals 170. The score in French is 210 minus 170, which equals 40. The result is 40.

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