Step-by-step explanation:
No. of coins in pounds → 1/3 x 498 = 166
No. of coins in 50p → 124
No. of coins in 20p → 498 - 166 - 124 = 208
Total Value: 166pounds + 124 (50p) + 208 (20p)
unfortunately, I do not know the exact currencies of pounds and "p" so I'm sorry I'm afraid but I can't calculate the total value