Question

the average weight of 25 candles is 40 gms if some candles of weight 50 gms each were removed the average weight of 37.5gms how many candles of weight 50 gms each were removed?​

Answer 1

Answer:

No. of candles of weight 50 gms each which were removed = 5 candles

Step-by-step explanation:

Average = Total weight of all candle/no. of candle

Average = 40

No. of candles = 25

.°. 40 = total weight / 25

=> 40*25 = total weight

=> Total weight in tge beginning = 1000

Let the no. of candles removed be ' x '

Hence total weight removed = 50*x = 50x

Average = 37.5

.°. 37.5 = ( 1000 - 50x )

( 25 - x )

=> 37.5 ( 25 - x ) = 1000 - 50x

=> 937.5 - 37.5x = 1000 - 50x

=> 50x - 37.5d = 1000 - 937.5

=> 12.5x = 62.5

=> x = 62.5 / 12.5 = 5