App Logo

No.1 PSC Learning App

1M+ Downloads
The ratio of the number of boys and girls in a college is 7 : 8. If the percentage increase in the number of boys and girls be 20% and 10% respectively, what will be the new ratio?

A21 : 22

B17 : 18

C8 : 9

DCannot be determined

Answer:

A. 21 : 22

Read Explanation:

Let the number of boys and girls be 70a and 80a respectively. Increased number of boys = 70a + 70a × 20/100 = 84a Increased number of girls = 80a + 80a × 10/100 = 88a New ratio of boys and girls = 84a : 88a ⇒ 21 : 22


Related Questions:

A basket consists of Apples and oranges in the ratio of 6: 5. If x apples and (x + 2) oranges were rotten then the ratio of the fresh apples and oranges is 4: 3. Find the total number of rotten apples and oranges in the basket and difference between apples and oranges in the basket is 8 ?.
5 : 7 = x : 35 ആണെങ്കിൽ x കണ്ടെത്തുക.
70 സെ.മീ. നീണ്ട ഒരു കയർ 2 കഷണങ്ങളായി മുറിക്കുന്നു. അതിൻ്റെ അനുപാതം 3 : 7 ആയിരുന്നു. അതിൻ്റെ ഏറ്റവും ദൈർഘ്യമേറിയ ഭാഗത്തിൻ്റെ നീളം എത്ര ?
A certain sum of money is distributed among Ravi, Rahul, and Raj in ratio 8 : 5 : 7 in such a way that share of Ravi was Rs. 1000 less than that the sum of share of Rahul and Raj. Find the difference between the shares of Ravi and Raj?
The ratio of Mangoes and Bananas in a garden is 9 ∶ 11 respectively. The average number of mangoes and bananas is 210. What is the difference between the number of Bananas and Mangoes in the garden?