If the average of 13, 15, and a is 16. Then a is
A4
B20
C18
D16
A4
B20
C18
D16
Related Questions:
What will be the difference between the sale price (in INR) of a book with a marked price
INR 1,500 under the following discount schemes?
(i) Two successive discounts of 20% each
(ii) Two successive discounts of 30% and 10%