Question

A bag contains 400 coins of 5p and 10p. Total value of the bag is 35. Find the Number of 5p coins.?

Answer 1

Answer:

100 coins

Step-by-step explanation:

let no. of 5 p coins is x and that of 10p is y

given that x + y = 400

5x/100 + 10y/100 = 35 ⇒ x + 2y = 700

(since one rupee = 100 paisa ; 5p = 5/100)

by substracting first equation from second

y = 300

by substituting it in first x + 300 = 400

x = 100