Final answer:
The value ratio of Geraint's 2p to 50p coins, when simplified, is 4 : 15. This is found by calculating the total value of each type of coin and then simplifying the resulting ratio.
Step-by-step explanation:
Geraint has 2p and 50p coins in a ratio of 20 : 3. To find the ratio of the value of the 2p coins to the value of the 50p coins, we need to consider the total value for each type of coin.
First, multiply the number of 2p coins by their value: 20 x 2p = 40p.
Then, multiply the number of 50p coins by their value: 3 x 50p = 150p.
To find the simplest form of the ratio of the value of the 2p coins to the value of the 50p coins, we compare 40p to 150p. This simplifies to 4 : 15 after dividing both sides by 10.
The ratio of the value of 2p coins to the value of 50p coins is 4 : 15 in its simplest form.