The price of a product was reduced by 35% last year. During this year by what percentage should it be increased to bring it back to the original price of last year?
A tempo, while travelling at 70 kmph, uses 40% more petrol than it uses while travelling at 50 kmph for travelling a certain distance. Using one litre of petrol, it can travel 19.6 km at 50 kmph. How far can the tempo travel (in KMs) on 10 litres of petrol at a speed of 70 kmph?
At 50 kmph , one km distance uses 1/19.6 litre petrol.
At 70kmph, one km distance uses 1.4/19.6 litre petrol
Distance traveled with 10 ltrs @ 70kmph = 10*19.6/1.4= 140 kms.
Pappu purchases 2 gadgets for Rs. 1120. He sells one at 15% profit and the other at 10% loss. He neither gains nor loses. The difference in the cost prices of 2 gadgets is?
Let the price of the 2 gadgets be x and y.
Thus x+y=1120
Now let x be sold at 15% profit and y be sold at 10% loss.
Thus 115x+90y=112000
Or 115x - 90(1120-x) = 112000
Or 115x - 90x + 100800 = 112000
Or 25x = 11200
Or x = 448
Thus y = 672
Let the numbers be x, x+1, x+2, x+3, x+4, x+5, x+6
Since their sum equals 1617, we have-
x+(x+1)+(x+2)+(x+3)+(x+4)+(x+5)+(x+6)=1617
7x+21=1617
7x=1596
x=228
Hence the numbers are: 228,229,230,231,234,235,236
Prime Numbers: 229, 233
Probability that girl student gets scholarship is = 0.4
Probability that boys student gets scholarship is = 0.6
Hence, Probability that girl don't get scholarship = 1-0.4 = 0.6
Probability that boy don't get scholarship = 1-0.6 = 0.4
probability that at-least one gets scholarship is = 1- (no one selected)
1 -(0.6*0.4) = 0.76