Question

5. In a class of 50 students, 10 have failed and their average marks are 28. The total marks obtained by the entire class are 2800. The average marks of those who have passed are
(a) 43 (b) 53 (c) 63 (d) 70
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Answer 1

Answer:

Total marks of 10 failed students = 28 x 10 = 280

and total marks of 50 students = 2800

Therefore, Total marks of 40 passed students . 5 = 2800 - 280 = 2520

Therefore, Average marks of 40 passed students =2520/40 =63

Step-by-step explanation:

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