Question

The ratio of boys and girls in a school is 12:5. if the number of the girls is 840, then total strength of the students is

a) 1190
b) 2380
c) 2856
d) 2142​

Answer 1

ANSWER :-

Correct option is (c) 2856

Solution:-

$Ratio \: of \: boys \: and \: girls \: is \: 12 :5$

Then,

$let \: the \: number \: of \: boys \: and \: girls \: be \: 12x \: and \: 5x$

$number \: of \: girls \: = 840$

$5x \: = \: 840$

$x \: = \: \frac{840}{5}$

$x \: = \: 168$

$number \: of \: boys \: 12x$

$12 \: \times 168 = 2016$

Number of girls + Number of boys

$840 + 2016 = 2856$

Total strength of students are 2856

Answer 2

Answer:option c...2856

Step-by-step explanation:

Ratio of boys to girls is 12:5

Let number of girls =5x

Number of boys=12x

Total number of students=17x

Given 5x =840

X=840÷5=168

Total number of students=17x=17×168=2856 students