History, asked by virajsalave17, 8 months ago

लाभ प्रतिशत बात कीजिए।
1215/16years.What isthgageofthegirl? | किसी कक्षा के 33 विद्वार्थियों को औसत आयु 13 वर्ष है। यदि एक लड़की कक्षा को
मतपसिलका हिसाब से 20दर्जनसिल खरीदता
बड़ देती हो तो औसत आयु 1215/16 हो जाती है। लड़की की आयु क्या है?
The average age of a class of 23 students is 13 years. If one girl leaves the class the average becomes​

Answers

Answered by rajshree1116
0

Answer:

mean =

sum of observation /number

13=

sum/33

sum of age of 13 girls = 429

after leaving 1 girl

no of girls = 32

mean = 207/16

sum of age of 12 girls

207/16 into 32 =414

age of 13th girl =sum of 13 girls - sum of 12 girls

= 429 - 414

= 15 years

Explanation:

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