(i) A's average number of points = \(\frac{14 + 16 + 10 + 10 }{4}\) = \(\frac{50}{4}\) = 12.5
(ii) To find the mean number of points per game for C, we will divide the total points by 3 because C played 3 games.
(iii) Mean of B's score = \(\frac{0 + 8 + 6 + 4 }{4}\) = \(\frac{18}{4}\) = 4.5
(iv) The best performer will have the greatest average of all. Now we can observe that the average of A is 12.5 which is more than that of B and C. Therefore, A is the best performer among these three.
X | 1 | 2 | 3 | 4 | 5 | 6 |
F | 8 | 9 | p | 16 | 9 | 8 |
Match the items given in Column I with one or more items of Column II.
Column I | Column II |
(a) A plane mirror | (i) Used as a magnifying glass. |
(b) A convex mirror | (ii) Can form image of objects spread over a large area. |
(c) A convex lens | (iii) Used by dentists to see enlarged image of teeth. |
(d) A concave mirror | (iv) The image is always inverted and magnified. |
(e) A concave lens | (v) The image is erect and of the same size as the object. |
- | (vi) The image is erect and smaller in size than the object. |