Question

6. Yesterday there were 40 people in my shop. 30% of them bought something. How
many people did not buy anything?
please solve this it's urgent​

Answer 1

SOLUTION :

❒ Given :-

• Number of people in the shop = 40

• Persons who bought something = 30% of 40

❒ To Find :-

• People who did not buy anything = ?

❒ Calculation :-

We have,

• Total number of people = 40

• Persons who bought something = 30%

∴ Number of persons who bought something = 30% of 40

➞ Number of persons who bought something = $\sf{\frac{30}{100}}$ × 40

➞ Number of persons who bought something = 12

Now,

• Number of total persons = 40

• Number of persons who bought something = 12

∴ Number of persons who did not buy anything = Number of total persons — Number of persons who bought something

➜ Number of persons who did not buy anything = 40 — 12

➜ Number of persons who did not buy anything = 28 ✪

• ★ Hence, 28 persons did not buy anything.

____________________________________________

Again,

• Total number of people = 40

• Persons who did not buy anything = 28

∴ Percentage of persons who did not buy anything = $\sf{ \frac{Persons \: \: who \: \: did \: \: not \: \: buy \: \: anything}{Number \: \: of \: \: total \: \: persons}}$ × 100

➜ Percentage of persons who did not buy anything = $\sf{\frac{28}{40}}$ × 100

➜ Percentage of persons who did not buy anything = 70% ✪

• ★ 70% of the total people did not buy anything.