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The average height of 12 students of a c...

The average height of 12 students of a class is 132.5 cm. If one more student joins, the average height becomes 131.2 cm, the height of the new student is:
एक कक्षा के 12 छात्रों की औसत ऊँचाई 132.5 सेमी है। यदि एक और छात्र आ जाता है, तो औसत ऊंचाई 131.2 सेमी हो जाती है, नए छात्र की ऊंचाई कितनी है?

A

122.3 cm

B

115.6 cm

C

128.5 cm

D

112.7 cm

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