The mean expanse of a batch of 20 boys is Rs. 8200 per month and that for a batch of 30 girls is Rs. 7200 per month. What is the combined expanse?
Hemant sold 10 sarees for a total profit of Rs. 460 and 12 sarees for total profit of Rs. 144. At what profit per saree should he sell the remaining 20 sarees so that he gets an average profit of Rs. 18 per saree?
The cost of apple and grapes are between Rs 20 and 30 per kg. If total cost of 5 Kg apple and 7 Kg grapes is a number X having unit's and hundred's place equal and sum of cost of 1 Kg apple and 1 Kg grapes is Rs 50. Then what is the value of X?
In what ratio must a grocer mix two varieties of pulses costing Rs. 15 and Rs. 20 per kg respectively so as to get a mixture worth Rs. 16.50 kg?
