The cost of 1 kg. of cashew nut is Tk. 500 and the cost of 1 kg of pistachio nut is Tk 580 . At what proportion should they be mixed so that the resultant mixture costs Tk.550 per kg?
সঠিক উত্তর: Option C
let 1 kg mixture
cashew=x kg
pistacio (1-x) kg
500x+(1-x) 580=550
x=3/8
1-x=1-3/8=5/8
3/8:5/8= 3:5