Wiley Edge Ratio and Proportions Quiz-4

Explanation:

Ratio of A and B Share=\frac{6000}{8000}=\frac{3}{4}

Ratio of profits = \frac{3\times 6}{4\times 12}=\frac{3}{8}

Explanation:

No. of girls=\frac{810}{4+5}\times 5=450

Explanation:

proportion=\frac{1}{2}\div \frac{2}{3}=\frac{3}{4}

First part=\frac{700}{3+4}\times 3=300

Explanation:

A’s age and B’s age are 3\times x and 5\times x respectively.

\frac{4\times x+3}{5\times x+3}=\frac{5}{6}

24\times x+18=25\times x+15

x=3

A’s present age=4\times 3=12

Explanation:
P’s salary=x
Q’s salary=5\times x
\frac{x+4000}{5\times x+4000}=\frac{7}{27}
27\times x+108000=35\times x+28000
7\times x=70000
x=10000
P’s salary initially=10000

Explanation:

Sum of smallest and largest units= 6

So sum=\frac{200}{2+5+2+1}\times 6=120

Explanation:

A’s age and B’s age are 5\times x and 3\times x respectively.

5\times x+3\times x=112

8\times x=112

x=14

B’s age after two years=14\times 3 +2=44

Explanation:

No. of boys= 9\times x

No. of girls=11\times x

9\times x=18

x=2

total number of students=(9+11)\times 2=40

Explanation:

Male population=3\times x

Female population=2\times x

3\times x+2\times x=10000

5\times x=10000

x=2000

So. male population=3\times 2000=6000

Explanation:

Let the fourth proportion be x.

10\times x=15\times 12

x=18

So the fourth proportion is 18.