Mathematics
A survey was conducted on 300 families having 2 children each. The results obtained are given below.
| Number of girl child | Number of families |
|---|---|
| 2 | 95 |
| 1 | 165 |
| 0 | 40 |
| Total | 300 |
If one family is selected at random, find the probability that it will have:
(a) one girl child
(b) one or more girl child
(c) no boy child
Related Questions
Use the following graph and answer the given questions :
(a) Write the co-ordinates of points A, B and C.
(b) Find the equation of a line passing through the mid-point of AC and parallel to AB.
A solid wooden toy is prepared by joining a cone, a cylinder and a sphere, as shown in the given diagram. The radius of each of the three solids is 7 cm and heights of each of the cone and the cylinder is 24 cm. Find :
(a) the total surface area of the given solid.
(b) the cost of painting the total surface at the rate of ₹ 0.50 per cm2.
In the given figure ‘O’ is the centre of the circle. PQ is a tangent to the circle at B and AB = AC. If ∠CBQ = 40°, find the unknown angles x, y, z and w.
