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Mrs lim wants to give some biscuits to her pupils. if each pupil receives 4 biscuits. she will have 39 biscuits left. if each pupil receives 7 biscuits, she will need 6 more biscuits. how many pupils are there?

Answer :

There are 15 pupils in Mrs. Lim's class.

Let's assume there are "x" pupils. According to the problem, we can form two equations:
1. 4x + 39 = total number of biscuits (leftover after distributing 4 biscuits to each pupil)
2. 7x - 6 = total number of biscuits (needed to distribute 7 biscuits to each pupil)
Solving these equations simultaneously, we get x = 9. Therefore, Mrs Lim has 9 pupils in her class.
Mrs. Lim has a certain number of biscuits to distribute among her pupils. If each pupil gets 4 biscuits, she'll have 39 biscuits left. If each pupil gets 7 biscuits, she'll need 6 more. Let's denote the number of pupils as "p" and the total biscuits as "b." We can create two equations:
1) b - 4p = 39
2) b - 7p = -6
Solving these equations simultaneously, we can eliminate "b" by subtracting equation 1 from equation 2:
-3p = -45
Now, we can find the number of pupils by dividing both sides by -3:
p = 15
So, there are 15 pupils in Mrs. Lim's class.

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