Question

A bag contains 1p,20 and 5p coins 3/8 of the bag are 1p coins There are as many 5p coins as 1p coins in the bag. There are 640 coins in total. Work out the number of 20 coins in the bag

Answer 1

Step by step explanation:
20p coins = 640 -640*(3/8+3/8)=640*(-16/8)=640 *2/8=640*1/4=160

Answer 2

160 off 20p coins

Explanation:

• 1 p, 20 p, 5 p coins
• 1 p= 3/8 of the bag
• 5 p= 1 p= 3/8 of the bag

• total coins= 640

20 p coins= 640 - 640*(3/8+3/8)= 640*(1- 6/8)= 640 * 2/8= 640* 1/4= 160