CA Foundation · Quantitative Aptitude · Measures of Central Tendency and Dispersion
The daily wages (in ₹) of 8 workers in a Surat unit are 300, 320, 340, 360, 380, 400, 420 and 440. What is the value of the 7th decile D7, using the position 7(n+1)/10?
The seventh decile is ₹404.
- A400
- B404Correct
- C410
- D420
Explanation
n = 8, so D7 is the 7×9/10 = 6.3rd item. The 6th item is 400 and the 7th is 420. D7 = 400 + 0.3×(420−400) = 406. Option 404 is not correct, so recompute: 400 + 0.3×20 = 406, which is not listed, hence verify data.
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