Answer:
The number of A's Dina got = 5/11 × 77 = 385 /11 = 35
Step-by-step explanation:
The number of A's Pete , Chris and Dina received are in the ratio of 4:2:5.
Let the total number of A's = y
Total from ratio = 4 + 2 + 5 = 11
chris A's = 2/11 × y
pete's A's = 2/11 × y + 14 = 4/11 × y
pete's A's
2/11 y + 14 = 4/11 y
14 = 4/11 (y) - 2/11 (y)
14 = 2/11 (y)
cross multiply
2y = 14 × 11
divide both sides by 2
y = 154/2
y = 77
Total number of A's = 77
The number of A's Dina got = 5/11 × 77 = 385 /11 = 35
