Home›MPPSC Forest›State Forest Service Mains Exam›Section 'B': Forestry and General Science›UNIT-10: Elementary Mathematics and General Mental Ability›Square root, percentage, ratio and proportion, use of log table›Which of the following proportion is not correct?

Which of the following proportion is not correct?

20181M#mppsc-forest#pyq#mcq#2018
A.12:20 :: 15:25
B.8:10 :: 36:45
C.6:8 :: 15:24Correct
D.None of these
Explanation & Solution

Correct Answer: (C) 6:8 :: 15:24

For a proportion a:b :: c:d, the product of extremes equals the product of means (ad = bc). Checking option C: 6:8 :: 15:24 means 6 ×\times× 24 = 144 and 8 ×\times× 15 = 120, which are unequal (144 != 120), making this proportion incorrect.

हिंदी में प्रश्न एवं आदर्श उत्तर

निम्न में से कौन सा समानुपात सही नहीं है?

A.12:20 :: 15:25
B.8:10 :: 36:45
C.6:8 :: 15:24सही
D.इनमें से कोई नहीं

सही उत्तर: (C) 6:8 :: 15:24

समानुपात के नियमानुसार बाह्य पदों का गुणनफल मध्य पदों के गुणनफल के बराबर होना चाहिए। विकल्प C में 68\frac{6}{8}86​ ≠\neq= 1524\frac{15}{24}2415​ है (क्योंकि 6 ×\times× 24 = 144 और 8 ×\times× 15 = 120), अतः यह समानुपात सही नहीं है।

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