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anygoal [31]
3 years ago
9

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 c

oins in total. Work out the number of 20 coins in the bag
Mathematics
2 answers:
Anton [14]3 years ago
3 0

Answer:

160 off 20p coins

Step-by-step 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

lara [203]3 years ago
3 0
Step by step explanation:
20p coins = 640 -640*(3/8+3/8)=640*(-16/8)=640 *2/8=640*1/4=160
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