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erica [24]
3 years ago
7

(3 marks)

Computers and Technology
1 answer:
muminat3 years ago
3 0

Answer: 1.5 : 1

Explanation:

The average of 92 marks for the test is a weighted average of the proportion of students in the class.

Assume boys are in the proportion, x.

(90 * x) + (95 * (1 - x)) = 92

90x + 95 - 95x = 92

-5x = 92 - 95

-5x = -3

x = -3/-5

x = 0.6

Boys are 0.6 of the class

Girls are:

= 1 - 0.6

= 0.4

0.6 : 0.4

1.5 : 1

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