D.I for IBPS CLERK

Study the following Pie- chart carefully to answer these questions.

Percentage distribution of teachers who teach six different subjects
Total number of Teachers= 2400

1. If five-sixth of the teachers who teach physics are female, then number of male physics teachers is approximately what percentage of the total number of teachers who teach chemistry?
1. 24
2. 8
3. 21
4. 16
5. 11

2. What is the total number of teachers teaching Hindi, English and Biology?
1. 808
2. 1008
3. 1028
4. 998
5. None of these

3. What is the difference between the total number of teachers who teach English and Physics together and the total number of teachers who teach mathematics and Biology together?
1. 110
2. 140
3. 120
4. 130
5. None of these

4. If the percentage of chemistry teachers is increased by 50% and percentage of Hindi teachers decreased by 25 percent the what will be the total number of chemistry and Hindi teachers together?
1. 1200
2. 1270
3. 1400
4. 1170
5. None of these

5. What is the respective ratio of the number of teachers who teach mathematics and the number of teachers who teach Hindi?
1. 13 : 8
2. 4 :13
3. 4 : 11
4. 8 : 5
5. None of these

Answers
1- 5
2- 2
3- 3
4- 4
5- 4

Explanation

1. No. of males teachers(physics) = 2400*20/100*1/6= 80
required %= 80*100/ (30/100*2400)= 11 approx

2. Required no. = (5+15+22)*2400/100= 1008

3. Required number= (15+20) - (8+22)/100*2400=120

4. Required no. (30* 2400/100) * 150/100 * (5*2400/100) * 75/100= 1170

5. Required ratio= 8 : 5