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:

The price of a movie ticket increased in the ratio 5 : 6. What is the increase (in Rs.) in the price of the ticket, if the original ticket price was Rs. 125?
58 രൂപ A, B, C എന്നിവർക്ക് വീതിച്ചത് ഇപ്രകാരമാണ്. A -യ്ക്ക് B -യേക്കാൾ 7 കൂടുതലുംB -ന് C -യേക്കാൾ 6 കൂടുതലും. അവർക്ക് ലഭിച്ച തുകയുടെ അംശബന്ധം :
In what ratio must wheat A at Rs. 10.50 per kg be mixed with wheat B at Rs. 12.30 per kg, so that the mixture be worth of Rs. 11 per kg?
Two numbers are in the ratio 4 : 5. If 2 is subtracted from the first number and 2 is added to the second number, then their ratio 2 : 3. The difference between the two numbers is:
36 നും 121 നും ഇടയിലുള്ള ശരാശരി അനുപാതം ഇനിപ്പറയുന്നവയ്ക്ക് തുല്യമാണ്: