Question

out of 9000 students 70% were boys.if 80% ofboys passed and none of girl failed. find total no. of candidates who passed​

Answer 1

Answer:

3960

Step-by-step explanation:

as stated 70% of 9000 is 6300 are total boys and rest 2700 are girls out of which none got failed and out of 6300 students 80% are got failed and 80% of 6300 is 4640 and rest 20% are passed the exam that is 1260.

So Total = 1260+2700

=3960

Answer 2

Answer:

$= total \: students = 9000 \\ = boys = 70\% \\ = passed \: boys = 9000 \: of \: 70\% \: of \: 80\% \\ = 100\% - 70\% = 30\% = girls \\ = \frac{70}{100} \times 9000 = \frac{70}{1} \times 90 = 70 \times 90 = 5400 = boys \\ = passed \: boys = \frac{80}{100} \times 5400 = \frac{80}{1} \times 54 = 54 \times 80 = 4320 \\ = passed \: girls = 9000 - 5400 = 3600 \\ = total \: passed \: children = 4320 + 3600 = 7920 \\ \therefore \: 7920 \: children \: has \: passed$

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Step-by-step explanation:

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