1.

40% of the total students in a class are boys. 75% of boys failed in a test. Boys who passed is what percent of total students of the class?1). 40%2). 18%3). 20%4). 10%

Answer»

Let, Total number of STUDENTS in the class is x

40% of total students are boys

∴ Number of boys in the class = 0.40x

75% of boys failed in the test

∴ 25% of boys PASSED in the test

Number of boys passed = 0. 25 × (0.40x) = 0.10x

∴ Required percentage

$(= \frac{{Number\;of\;boys\;passed}}{{Total\;number\;of\;students}} \TIMES 100\%)$

$(= \frac{{0.10x}}{x} \times 100\%)$

= 10%


Discussion

No Comment Found

Related InterviewSolutions