Identify the correct mathematical statements:
A. A batsman makes a score of 87 runs in the 17th inning and thus increases his average by 3. Then his average after 17th inning is 36.
B. The value of a number subtracted from Numerator and Denominator of the fraction 6/7 to get a fraction equal to 3/4 is 3.
C. If 15% of 40 is greater than 25% of a number by 2, then the number is 16.
D. The value of (1+1/2) (1+1/3) (1+1/4) ...... (1+1/120) is 60.5
Choose the correct answer from the options given below:सही गणितीय कथनों की पहचान कीजिए:
A. एक बल्लेबाज़ 17वीं पारी में 87 रन बनाता है और इस प्रकार अपना औसत 3 बढ़ा लेता है। तब 17वीं पारी के बाद उसका औसत 36 है।
B. भिन्न 6/7 के अंश और हर दोनों में से घटाई जाने वाली वह संख्या, जिससे 3/4 के बराबर भिन्न प्राप्त हो, 3 है।
C. यदि 40 का 15%, किसी संख्या के 25% से 2 अधिक है, तो वह संख्या 16 है।
D. (1+1/2) (1+1/3) (1+1/4) ...... (1+1/120) का मान 60.5 है।
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Correct answer: A. B, C and D Onlyकेवल B, C और D
Explanation
A: 16x + 87 = 17(x + 3) gives x = 36 (average after 16 innings), so the average after the 17th inning is 39 – A is false. B: (6 − 3)/(7 − 3) = 3/4 – true. C: 15% of 40 = 6; 6 − 2 = 4 = 25% of 16 – true. D: the product telescopes to 121/2 = 60.5 – true. Answer: B, C and D Only.A: 16x + 87 = 17(x + 3) से x = 36 (16 पारियों के बाद औसत), अतः 17वीं पारी के बाद औसत 39 है – A गलत। B: (6 − 3)/(7 − 3) = 3/4 – सही। C: 40 का 15% = 6; 6 − 2 = 4 = 16 का 25% – सही। D: गुणनफल सरल होकर 121/2 = 60.5 – सही। उत्तर: केवल B, C और D।More Mathematical Reasoning and Aptitude questions
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