One-third of the boys and one-half of the girls of a college participated in a sport. If the number of participating students is 300, out of which 100 are boys. What is the total number of students in the college?

Correct Answer: 96.1%

Explanation:

Non- defective products

 

25 x 0 . 98 + 35 x 0 . 96 + 40 x 0 . 95 100 x 100 = 96 . 1

Correct Answer: Rs. 168 less

Explanation:

Cost of each cake P1 & P2 = Rs. 12

Offer decrease in % = 20%

Increase in sale per day (Q2) = 250 - 18%

Total quantity per day (Q1) = 250

Hence, required change total revenue

TR = P2Q2 - P1Q1 = (12 x 0.8 x 250 x 1.18) -  (12 x 250) = - Rs.168.

Correct Answer: 7500

Explanation:

Let the candidates be A & B
35%-----------A
65%-----------B

Difference of votes (65-35)% = 30%

=>          30% ------- 2250
Then for 100% -------- ?     => 7500

Correct Answer: Rs. 3550

Explanation:

Let the cost price of the article be 'P'

Then from given data,

$$\begin{gathered} P + 28 P 100 = 4544 \\ = > 128 P = 454400 \\ = > P = 3550 \end{gathered}$$

Hence, the cost price of the article = P = Rs. 3550

Correct Answer: 84

Explanation:

Ratio of girls and boys = 100% : 75% = 4:3

Difference is 1 unit = 35

So, 3 units = 35 x 3 = 105

If 20% absent, that?s mean 80% present.

So, present boys = 80% of 105 =  80 × 105 100 = 84

Correct Answer: 0.0625

Explanation:

25% of 25% means

 

 

 

25/100 of 25/100

 

 

 

i.e, 1/4 of 1/4

 

 

 

or in other words 1/4 x 1/4=1/16

 

 

 

Hence, the answer is 1/16 = 0.0625.

Correct Answer: None of these

Explanation:

Total land of Sukhiya = 480x/0.6 = 800x

 

Cultivated land of village = 384000x

 

Required percentage =  800 x 384000 x 100 = 0 . 20833

Correct Answer: 1% decrease

Explanation:

Net % effect on revenue = - 10 + 10 -(10×10)/100 = - 1 Hence % reduction in revenue = 1%

Correct Answer: 100 & 4

Explanation:

Let the first number be x and the second number be y.

Given

5% of x = (25% of y) + y

=> 5x/100 = 5y/4

=> x = 25y ......(1)

and also given that, x - y = 96

=> x = 96 + y .....(2)

From (1)&(2)

25y = 96 + y

=> 24y = 96

=> y = 4

From (1)

x = 96 + 4 = 100

Hence, the numbers are 100 & 4.

Correct Answer: 20

Explanation:

Let the rquired number be 'P'

According to the question,

$$\begin{gathered} 100 x P 100 = 20 \\ = > P = 20 x 100 100 = 20 \end{gathered}$$

Hence, 100 percent of the number 20 is 20.

 

Now, you can also try for

20 percent of what number is 100

$$\begin{gathered} 20 x P 100 = 100 \\ = > P = 100 x 100 20 = 500 \\ = > P = 500 \end{gathered}$$

Hence, 20 percent of the number 500 is 100.