Question

if the cost of 1 coconut is 5 rupies and cost of 1 mango is 1 rupies and cost of 20 lemons is 1 rupies and I want to buy 100 fruits each fruit must be included and bujdet is 100 rupies​

Answer 1

Answer:

Let the no. of Coconut = C, Mango = M and Lemons = L

So, C + M + L = 100 …………………(1) and

C * 5 + M * 1 + L * (1/20) = 100

Or, 5C + M + 0.05L = 100 ……….(2)

From eqn(1), M = 100 - C - L

Substituting value of M in eqn (2), 5C + 100 - C - L + 0.05L = 100

Or, 4C - 0.95L = 100 -100 = 0

Or, C = 0.95L/4 where C and L are both integers and less than 100

Solving by trial & error, assume, L = 80, then C = 0.96 * 80/4 = 19

M = 100- 19 - 80 = 1

So, the answer is Coconut = 19, Lemons = 80 and Mango =1

Explanation: