1.  Last year, there were 610 boys in a school. The number decreased by 20% this year. How many girls are there in the school, if the number of girls is 175% of the total number of boys in the school this year?
A. 650
B. 900
C. 850
D. 950
E. None of the above

Answer: Option A

Explanation:

Last year number of boys in school = 610

Number of boys in school this year

      = (610) - (610 x 20/100)

      = (610 - 122) = 488

Number of boys in school this year x 175%

    = 488 x (175/100) = 488 x (7/4)

    = 122 x 7 = 854

Hence, number of girls in school this year in 854.