Direction : What value should come in place question mark(?) in the following questions?

$$2\over7$$ of $$ 5\over6$$ of ?=200

Bananas are bought at 3 for Rs. 2 and sold at 5 for Rs. 4. Find the gain or loss percent.

A bar graph shows unit production and unit sold of the different type of mobile company A, B, C, D E and F. Study the bar graph and give the answer of following questions.

Which mobile company have the maximum difference between the unit produced and unit sold.

Directions: The following table represents the percentage marks of four students in six subjects.
Consider the table and answer questions based on it

Average marks obtained in Science is higher than that of Maths by

Direction: Study the information given below carefully and answer the questions given below.
There are 450 coupons which can be used in Pedicure and Hair cutting. Ratio between Males to Females who use their coupons in Hair cutting is 13: 7 Number of males who use their coupons in Pedicure is 72 more than number of females who use their coupon in Hair cutting. Total number of males who use their coupon in Pedicure and Haircutting together is 174 more than total number of females who use their coupon in Pedicure and Haircutting together.

Find the ratio between Total number persons who use their coupons in Pedicure to total number of persons who use their coupons in Haircutting. 

A sum of ₹14,375, when invested at r% interest per year compounded annually, amounts to ₹16,767 after two years. What is the value of r?

Find the value of ∠OBE=?

If the difference between CI and SI for 3 years at the rate of 10% is Rs 31. Find the principle.