Question

some guavas and apples were purchased at the rate of ₹3 for a guava and ₹ 12 for an apple. 15 fruits were purchased for ₹72. find the the number of apple purchased

Answer 1

3 apples were purchased and 12 guava
The equation is
you know that you have 15 fruits for Rs 72
so first you will find Apple by 12×3 = Rs36
Now you know that you have purchased 3 apples for Rs 36
Now for guava first you will find that how many fruits are left = 15 - 3 = 12
and the cost of 12 guava = 12×3 = Rs 36
So 12guava + 3apple = 15 fruits and Rs36 for Apple and Rs36 for guava = Rs72
That it

Answer 2

3 apple and 12 guava