Data Interpretation - Table Charts - Discussion
Discussion Forum : Table Charts - Table Chart 4 (Q.No. 3)
Directions to Solve
Study the following table and answer the questions.
Classification of 100 Students Based on the Marks Obtained by them in Physics and Chemistry in an Examination.
| Subject | Marks out of 50 | ||||
| 40 and above | 30 and above | 20 and above | 10 and above | 0 and above | |
| Physics | 9 | 32 | 80 | 92 | 100 |
| Chemistry | 4 | 21 | 66 | 81 | 100 |
| Average (Aggregate) | 7 | 27 | 73 | 87 | 100 |
3.
The percentage of number of students getting at least 60% marks in Chemistry over those getting at least 40% marks in aggregate, is approximately?
Answer: Option
Explanation:
Number of students getting at least 60% marks in Chemistry
= Number of students getting 30 and above marks in Chemistry
= 21.
Number of students getting at least 40% marks in aggregate
= Number of students getting 20 and above marks in aggregate
= 73.
| Required percentage |
|
|||||||
| = 28.77% | ||||||||
 29%. |
Discussion:
14 comments Page 1 of 2.
Yash Detani said:
4 months ago
Answer is not 41, because 30 and above includes the number of students who scores 40 to 50.
Anchal said:
5 years ago
Marks that given which is out of 50.
60% of 50 = 30 & 40% of 50 = 20.
For chemistry above 60% i.e above 30 = 21 & for aggregate above 40% i.e above 20 = 73.
Percentage = 2100/73 = 28.76% ~ 29%.
60% of 50 = 30 & 40% of 50 = 20.
For chemistry above 60% i.e above 30 = 21 & for aggregate above 40% i.e above 20 = 73.
Percentage = 2100/73 = 28.76% ~ 29%.
(4)
Geetha said:
5 years ago
Thank you @Farhin.
Haritha said:
6 years ago
Aggregate score in chemistry is 73.
(1)
Farhin said:
6 years ago
60% of chemistry means (60/100 * 50) =30.
So we have to take 30 above in chemistry i.e =21.
40 % of aggregate means (40/100 *50) = 20.
So we have to take 20 above in aggraget i.e = 73
Now we have to find a percentage so (21/73 *100).
Hence we get (28.77).
So we have to take 30 above in chemistry i.e =21.
40 % of aggregate means (40/100 *50) = 20.
So we have to take 20 above in aggraget i.e = 73
Now we have to find a percentage so (21/73 *100).
Hence we get (28.77).
(1)
Sushmitha said:
7 years ago
Please, anyone explain this to me.
Nandhu said:
8 years ago
Actually (60/100)*50=30...so yu go 30and above in chemistry. now you get 21, keep it safe...then you must go to aggregate atleast40% (40/100)*50=20.
so you go 20and above in aggregate, now, you get 73.
Then you find the required percentage ..(21/73)*100=28.77% ~=29%.
so you go 20and above in aggregate, now, you get 73.
Then you find the required percentage ..(21/73)*100=28.77% ~=29%.
Krishna said:
8 years ago
30 and above marks students comes under 60% = 27 students.
40 and above marks students comes under 20% = 73 students.
Here they are asking " The percentage of number of students getting at least 60% marks in Chemistry over those getting at least 40% marks in aggregate ".
Therefore we calculate 27/73 X 100.
By solving, we will get the answer.
40 and above marks students comes under 20% = 73 students.
Here they are asking " The percentage of number of students getting at least 60% marks in Chemistry over those getting at least 40% marks in aggregate ".
Therefore we calculate 27/73 X 100.
By solving, we will get the answer.
Chandan said:
10 years ago
Why we are not take 50*0.6 equal to 40?
Rajnish said:
1 decade ago
Fast calculation using fraction:
(21/73)*100~(20/70)*100 = (2/7)*100 = (2*1/7)*100 = (2*14.28)*100 = 28.56%.
So answer approximately 29%.
(21/73)*100~(20/70)*100 = (2/7)*100 = (2*1/7)*100 = (2*14.28)*100 = 28.56%.
So answer approximately 29%.
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