Number of female doctors is more than the average number of female doctors (taking all seven cities together) in exactly ______ cities.
- AOption (a)
2
- BOption (b)
3
- COption (c)
4
- DOption (d)
6
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Correct answer
4
Why this answer is correct
Concept used:
Average = Sum of observation / Number of observations
Calculation:
A = 2400 × 0.19 × 0.24 = 109.44
B = 2400 × 0.21 × 0.16 = 80.64
C = 2400 × 0.09 × 0.11 = 23.76
D = 2400 × 0.12 × 0.08 = 23.04
E = 2400 × 0.17 × 0.16 = 65.28
F = 2400 × 0.14 × 0.19 = 63.84
G = 2400 × 0.08 × 0.06 = 11.52
Total number of female doctors = 109.44 + 80.64 + 23.76 + 23.04 + 65.28 + 63.84 + 11.52 = 377.52
Average = \(\dfrac{377.52}{7} \) = 53.93
∴ Number of female doctors is more than the average number of female doctors (taking all seven cities together) in exactly 4 cities.