Average Practice Question and Answer

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Answer : 1. "68"

Q: 11 परिणामों का औसत 50 है। यदि प्रथम 6 का औसत 49 तथा अन्तिम 6 का औसत 53 हो तो छठा परिणाम बताइए। 1381 0

  • 1
    56
    Correct
    Wrong
  • 2
    62
    Correct
    Wrong
  • 3
    50
    Correct
    Wrong
  • 4
    58
    Correct
    Wrong
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Answer : 2. "62"
Explanation :

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Answer : 2. "45 yrs"
Explanation :

Answer: B) 45 yrs Explanation: Let father's age be x year and son's age be y year. According to question, 2(x+y) = 8y _______(I) and (x+y)/2 = 30 => x+y = 60 years__________(II) From equation (I) and (II) 8 y = 120 y = 15 years, Hence x = 45 years.

Q: किसी कक्षा के 50 में से 40 लड़कियों की औसत ऊँचाई 148 सेमी. और शेष लड़कियों की औसत ऊँचाई 150 सेमी. है। पूरी कक्षा की औसत ऊँचाई क्या है? 1643 0

  • 1
    148.8 सेमी
    Correct
    Wrong
  • 2
    149.2 सेमी
    Correct
    Wrong
  • 3
    148.4 सेमी
    Correct
    Wrong
  • 4
    144 सेमी
    Correct
    Wrong
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Answer : 3. "148.4 सेमी"
Explanation :

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Answer : 4. "1 वर्ष"
Explanation :

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Answer : 4. "4"
Explanation :

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Answer : 2. "Rs . 310 "

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