Stats
Cost of plastic forms the major part of raw material cost of making a pen, nearly double of all the other material costs combined. If material costs are represented on a pie chart, what will be the central angle for plastic cost?

Correlation

Find correlation coefficient between x -> 10,12,14,18,20,50 and y -> 45,56,32,68,25,70

P&C
Find total of all 5 digits numbers formed from - 1,3,5,7, and 9

Dispersion

While doing some calculations on a certain dataset, a student, by mistake, took all positive numbers as negative (the data had only positive values). What will be the impact of this on the coefficient of variation?

equations
15 apples, 5 oranges and 6 bananas cost Rs. 850. 4 apples, 3 oranges and 5 bananas cost Rs. 600. How much will 22 apples, 4 oranges and 2 bananas cost?

Ratios
A person invests Rs. 1500 at the end of each year for 3 years. At the end of third year, he withdraws half of the amount and then keeps the remaining amount invested for 3 more years. If CI rate is 9%pa, find the amount that he will get after 6 yrs

Options for above question

There is a cube with side = 10. Another cube is created with side equal to half of the first one. Third one is created with side equal to half of second one. If this process is repeated infinitely, what is the total of volumes of all the cubes?

Relations
'is perpendicular to' in terms of straight lines is what kind of a relation?

TVM/ MOF

Ms. X invests Rs. 1000 at the end of year 1, for the next 10 years, she keeps on increasing the investment by 10% every year. If interest rate is 9%, what is the present value of this investment?

P&C | Probability

There are pieces of paper each containing one permutation of the word 'CONTAINING'. If you pick a piece up at random, what is the probability that all three Ns appear at the very end?

Quadratic Equations

If one root of the equation x^2+ax+12 = 0 is 4 and the equation x^2 + ax + b = 0 has equal roots, find b.