Multiple choice

The average of marks of Gagan in 7 subjects was 75. His average in 6 subjects, excluding science, was 72. How many marks did he score in science?

  1. 72

  2. 90

  3. 93

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Total marks for 7 subjects = 7 * 75 = 525. Total marks for 6 subjects = 6 * 72 = 432. The difference, 525 - 432 = 93, is the score in science.

AI explanation

The total marks in all 7 subjects is 7 multiplied by 75, which equals 525. The total marks in the 6 subjects excluding science is 6 multiplied by 72, which equals 432. The marks scored in science are the difference between the two totals, 525 minus 432, giving 93.

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