Marcus has a total of 10 nickels and dimes in his pocket. he has a total of 70 cents. how many dimes does he have in his pocket?

10 coins in nickels & dimes = $0.70

1 nickel = $0.05

1 dime = $0.10

4 dimes = $0.40

6 nickels = $0.30

4 dimes + 6 nickels = 10 coins

$0.40 + $0.30 = $0.70

The answer is: He has a total of 4 dimes in his pocket.