Harshita jain Asked a Question
October 12, 2020 11:08 pmpts 30 pts
The average of 12 numbers is 9. If each number is multiplied by 2 and added to 3, the average of the new set of numbers is B) 18 (A) 9 (D) 27 (C) 21
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  • Priya gulani thankyou
    option c 21
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  • Priya gulani Best Answer
    see if it helps you
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    Harshita jain
    i did in the same manner bt in book there was a different ans. sol.
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  • Rishab Soni
    Its 21. The average of 12 numbers is 9. That means the total number is 12 X 9 = 108 if each number is multiplied by 2, the average will also be multiplied by 2. That is the new av...
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    Harshita jain
    in book this is mentioned 🤔 that is why i had doubt
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  • Rucha rajesh shingvekar
    Correct Option: C If each number of a set be multiplied by m, the average gets multiplied by m. If each number of a set be increased by p, the average gets increased by p. Here , ...
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  • Rucha rajesh shingvekar
    Let the sum of 12 no. be x=x1​+x2​+........x12​ average=total no.sum of no.​ ⇒9=12x​ sum=108 let sum of new numbers is according to question (x1​×2+3)+(x2​×2+3)+......(x12​×2...
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    Harshita jain
    in book this is mentioned 🤔 that is why i had doubt
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