Mary ordered dinner for 10 people. Three people ordered the 4.75 chicken dinner, two people ordered the 4.95 fish dinner and five had beef dinner at cost of 6.75 each. What was the average cost of each dinner at Mary's party

5.79

Step-by-step explanation:

From the question,

3 people ordered the 4.75 chicken dinner. The cost will be:

= 4.75 × 3

= 14.25

2 people ordered the 4.95 fish dinner. The cost will be:

= 4.95 × 2

= 9.9

5 had beef dinner at cost of 6.75 each. This cost will be:

= 6.75 × 5

= 33.75

Total cost will be:

= 14.25 + 9.9 + 33.75

= 57.9

Therefore, the average cost of each dinner at Mary's party will be:

= Total cost / Number or people

= 57.9 / 10

= 5.79