Question

plzzz help me with the solution

Answer 1

(i)

center angle for o=

$\frac{45}{100} \times 360 = 162$

for ab=

$\frac{5}{100} \times 360 = 18$

$forb = \frac{30}{100} \times 360 = 108$

$for \: a = \frac{20}{100} \times 360 = 72$

(ii)

let total=x

30% of x=600

$\frac{30}{100} \times x = 600$

$x = 600 \times \frac{100}{30}$

x=2000 people

Answer 2

$100 \% = 360 \: degree \\ \\ so \: 45\% = \frac{360 \times 45}{100} \\ \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 162 \: degree \\ \\ similarly \\ \\ 5\%blood \: group = \frac{360 \times 5}{100} \\ \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 18 \: degree \: \\ similarly \: you \: can \: do \: all.$