Q3 of 47 Page 1

A number is chosen at random from the numbers −3,−2,−1,0,1,2,3. What will be the probability that square of this number is less than or equal to 1?

Total numbers = 7

Square of each number be 9, 4, 1, 0, 1, 4, 9.


Therefore, number whose square is less than or equal to 1 are -1, 0 and 1 (i.e. three numbers)


∴ Probability that square of the number is less than or equal to 1




More from this chapter

All 47 →
1

The ratio of the height of a tower and the length of its shadow on the ground is √3:1. What is the angle of elevation of the sun?

 2

Volume and surface area of a solid hemisphere are numerically equal. What is the diameter of hemisphere?

 4

If the distance between the points (4, k) and (1, 0) is 5, then what can be the possible values of k?

 5

Find the roots of the quadratic equation √2x2 + 7x + 5√2 = 0.