There are 150 coins in a jar - OCR - GCSE Maths - Question 3 - 2021 - Paper 3

Next, for the 20p coins:

1. Calculate ( \frac{3}{10} ) of 150:

   $$\frac{3}{10} \times 150 = 45$$

So, there are 45 coins that are 20p coins.

Now, we find the number of 50p coins:

1. Total coins = 150

2. Coins accounted for: 10p + 20p

   $$30 + 45 = 75$$

3. Remaining coins:

   $$150 - 75 = 75$$

So, there are 75 coins that are 50p coins.

Now, we calculate the total value:

1. Value from 10p coins:

   $$30 \times 0.10 = 3.00 \, £$$

2. Value from 20p coins:

   $$45 \times 0.20 = 9.00 \, £$$

3. Value from 50p coins:

   $$75 \times 0.50 = 37.50 \, £$$

4. Total value:

   $$3.00 + 9.00 + 37.50 = 49.50 \, £$$

The total value of the coins is £49.50.