Answer:
$31.4
Step-by-step explanation:
Given –
Cost of 6 oranges = $3.00
Cost of 1 grapefruit = $2.40
Cost of 1 orange = $3.00/6
= $0.5
People bought 10 oranges and 11 grapefruits.
Cost of 10 oranges = 10 x cost of one orange
= 10 x $0.5
= $ 5
Cost of 11 grapefruit = 11 x cost of one grapefruit
= 11 x $2.4
= $26.4
So total cost of 10 oranges and 11 grapefruits
= $ 5 + $26.4
= $31.4