The average weight of 3 students is 45 kg. if one more student weighing 51 kg. What’s the new average weight after the student joins?

Solution
3 student average weight / छात्र कुल वजन= 45 kg
total weight $ 45 \times 3 =135 $
one more student weighing 51 kg
तीनो छात्र का कुल वजन total weight of three students + शामिल हुए छात्र का वजन Weight of the student attending 135 +51= 186 kg
Now only students number अब केवल छात्रों की संख्या = 4
new average नया औसत = $ \frac{186}{4}$ 46.5 kg