In a class out of 90 students, the 60% are girls and the rest of boys. If the average marks of girls is 62 and average marks of boys is 70, then find the average marks of all the students in the class.

Options

A. (A). ` 62.2 `
B. (B). ` 67 .6`
C. (C). ` 68.4 `
D. (D). ` 65 .2 `

Answer

D