Question

in an examination there were 640 boys and 360 girls 60% of boys and 80% of girls were successful find% of Students susscuful ​

Answer 1

Answer:

60 + 80=140 percent is the I am hoping

Answer 2

Explanation:

60 % of boys successful = 60 % of 640

80 % of girls successful = 80 % of 360

$\frac{60}{100 } \times 640 = 384 \\ \frac{80}{100} \times 360 = 288$

total students = 640 + 360 = 1000

number of students successful = 384 + 288 = 672

% of students successful =

$\frac{672}{1000} \times 100 = 67.2$

% of students successful = 67.2 %