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प्रश्न
The mean of a, b, c, d and e is 28. If the mean of a, c and e is 24, then mean of b and d is
पर्याय
24
36
26
34
उत्तर
34
Explanation;
Hint:
Mean = 28
a + b + c + d + e = 28 × 5 = 140
= 140 ...(1)
But `("a" + "c" + "e")/3` = 24
a + c + e = 72
a + b + c + d + e = 140
b + d + 72 = 140
b + d = 140 – 72
= 68
Mean = `68/2`
= 34
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संबंधित प्रश्न
Following table shows the points of each player scored in four games:
| Player | Game 1 | Game 2 | Game 3 | Game 4 |
| A | 14 | 16 | 10 | 10 |
| B | 0 | 8 | 6 | 4 |
| C | 8 | 11 | Did not play | 13 |
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- Find the mean to determine A’s average number of points scored per game.
- To find the mean number of points per game for C, would you divide the total points by 3 or by 4? Why?
- B played in all the four games. How would you find the mean?
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