Maths
posted by 10M1 on .
In a jewllery shop, necklaces are sold as either 18 carat gold, 22 carat gold or 24 carat gold. The number of necklaces in stock in the shop are shown:
18 carat: 40 stock
22 carat: 
24 carat: 20 stock
25% of the stocks of necklaces are 22 carat
How many 22 carat necklaces are there in stock in the shop?
Is the answer 15, I ain't too sure!

Let x be the number of 22 carat necklaces.
x = (1/4)(40 + x + 20)
= x/4 + 15/4
3x/4 = 15/4
x = 15
Yes, your answer is right.