Book Maths Puzzle Numerical Ability

how many terms will (a+b+c)^2 have?
a. 22C2
b. 20C2
c. 19C2
d. 18C2

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Book Other Question

A trader has 6 quintals of rice. he sold a part of it at 7% profit and remaining at 17% profit, so that he made a total profit of 11%. how much rice did he sell at 17% profit? you have all the numbers card,pick 2 cards, what is the probability that they have different colors but same number?