In a class of 70 students 40 are girls and remaining are boys The average marks of the boys are 63 a...........

Quantitative Aptitude (CPO) Average

In a class of 70 students, 40% are girls and remaining are boys. The average marks of the boys are 63 and that of the girls are 70.

What is the average marks of the whole class?

This questions was previously asked in

SSC CPO 13th-March-2019-Shift-1

65.4

65.8

65.2

64.8

- Total students: 70.

- Percentage of girls: 40%, so number of girls = 0.4 x 70 = 28.

- Number of boys: 70 - 28 = 42.

- Average marks of boys: 63.

- Total marks of boys = 63 x 42 = 2646.

- Average marks of girls: 70.

- Total marks of girls = 70 x 28 = 1960.

- Total marks of whole class = 2646 + 1960 = 4606.

- Average marks of whole class = Total marks / Total students = 4606 / 70 = 65.8.

- Option 1: 65.4

- Option 2: 65.8

- Option 3: 65.2

- Option 4: 64.8

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