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Directions For Questions
Study the following information carefully and answer the given questions:
The pie chart shows the number of students like five different sports.
The given table shows the number of boys to girls like five different sports.
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What is total number of boys like all the sports together?
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Total number of boys=200 + 250 + 320 + 150 + 100=1020
The number of girls likeFootball is approximately what percent of the number of boys like Cricket?
Required percentage=150/200 * 100=75%
What is the ratio of the number of girls like Golf to the number of girls like Tennis?
Required ratio=50:200
=1:4
The number of boys like Hockey is approximately what percent of the number of students like Hockey?
Required percentage=320/600 * 100=53%
What is the difference between the total number of boys and girls like all the sports together?
Total number of girls=300 + 150 + 280 + 50 + 200=980
Difference=1020 – 980=40
The shopkeeper sold two mobiles for Rs.6000 each. If one of the mobile sold at 20% profit and another one is 20% loss, then what is the profit or loss for whole transaction?
Total SP=6000 + 6000 =Rs. 12000
CP of the first mobile=100/120 * 6000=Rs. 5000
CP of second mobile=100/80 * 6000=Rs. 7500
Total CP=5000 + 7500=Rs. 12500
Loss=12500 – 12000=Rs.500
A boat travels 75 km downstream and 60 km upstream in 7 hours. What is the speed of the stream?
Speed of boat in still water=B
Stream speed=W
Downstream speed=B + W
Upstream speed=B – W
75/B + W) + 60/(B – W)=7
(75(B – W) + 60 (B + W))/(B2 – W2)=7
75B – 75W + 60B + 60W=7 * (B2 – W2)
135B – 15W=7B2 – 7W2
7B2 – 135B = 7W2 – 15W
B(7B – 135)=W(7W – 15)
We cannot find the answer.
Ovi borrowed certain amount of money in bank which offers 10% per annum compound interest for 2 years. Ovi invested half of the amount in scheme A which offers 20% per annum simple interest and after four years the amount becomes Rs.3600. Find the interest amount paid by Ovi to bank in after 2 years.
Let Borrowed amount=x
Simple interest=P * N * R/100
CI=P * (1 + R/100)n - P
x/2 * 20 * 4/100=3600 – x/2
4x/10 + x/2=3600
9x=36000
x=Rs. 4000
CI=4000 * (1 + 10/100)2 – 4000
=Rs. 840
A bag contains 3 red balls and 4 green balls. What is the probability of selecting 2 green balls from bag?
Required probability=4C2/7C2
= (4 * 3)/(7 * 6)
=2/7
Pipe A fill the tank in 4 times faster than pipe B. If pipe A is filling the tank and B is emptying the tank and they opened together, then the tank completely will be filled in 24 hours. If pipe A and B both are filling the tank and they opened together, then the tank will be full completely in?
Pipe A fill the tank in x hours
Pipe B fill or empty the tank in 4x hours
1/x - 1/4x=1/24
(4 – 1)/4x=1/24
1/x=1/18
A fill the tank in 18 hours
Pipe B fill the tank in (4 * 18)= 72 hours
A + B=1/18 + 1/72
=5/72
So, A and B together can fill the tank in 72/5 hours (i.e) 14(2/5) hours
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