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This is a Matrix question.

LCM

1 5/7 = 12/7

    Fail     pass  total
Boy   2u 10u 12u  
Girl       7u
Total     19u

10u = 1240

1u = 1240 ÷ 10 = 124

19u  = 124 × 19 = 2356

 

 

 

0 Replies 1 Like ✔Accepted Answer

This is a Matrix question.

LCM

1 5/7 = 12/7

    Fail     pass  total
Boy   2u 10u 12u  
Girl       7u
Total     19u

10u = 1240

1u = 1240 ÷ 10 = 124

19u  = 124 × 19 = 2356

 

 

 

0 Replies 0 Likes

1 – (1/6) = 5/6 ——-> 1240
(1240/5) x 6 = 1488 (total boys)
1 5/7 = 12/7
1488 x (7/12) = 868 (total girls)
868 + 1488 = 2356

Ans : 2356 pupils.

0 Replies 1 Like
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