Students in a commerce class took a test. The average score of men is 70 and of women is 83. The class average is 76. What is the ratio of men to women in the class?

If one third of one-fourth of a number is 15, then three-tenth of that number is

What is the probability of drawing a king or a heart from a deck of cards ?

The maximum value of 3 cosx + 4sinx + 8 is

The sum of three consecutive odd numbers is 20 more than the first number. What is the middle number ?

There are 6 tasks and 6 persons. Task 1 cannot be assigned either to person 1 or person 2. Task 2 must be assigned to either person 3 or person 4. Every person is to be assigned one task. In how many ways can the assignment be done ?

In a simultaneous throw of a pair of dice, find the probability of getting a total of 9 or more.

In a triangle ABC, AD is the bisector of angle A. If AC =4.2 cm, DC = 6 cm, BC =10 cm, find AB.

The length, breadth and height of a rectangular cuboid are in the ratio 1: 2 : 3. If the length, breadth and height are increased by 100% each then what would be the increase in the volume of the cuboid ?