# Data Interpretation - Table Charts - Discussion

Discussion Forum : Table Charts - Table Chart 3 (Q.No. 5)

*Directions to Solve*

The following table gives the percentage of marks obtained by seven students in six different subjects in an examination.

The Numbers in the Brackets give the Maximum Marks in Each Subject.

Student | Subject (Max. Marks) | |||||

Maths | Chemistry | Physics | Geography | History | Computer Science | |

(150) | (130) | (120) | (100) | (60) | (40) | |

Ayush | 90 | 50 | 90 | 60 | 70 | 80 |

Aman | 100 | 80 | 80 | 40 | 80 | 70 |

Sajal | 90 | 60 | 70 | 70 | 90 | 70 |

Rohit | 80 | 65 | 80 | 80 | 60 | 60 |

Muskan | 80 | 65 | 85 | 95 | 50 | 90 |

Tanvi | 70 | 75 | 65 | 85 | 40 | 60 |

Tarun | 65 | 35 | 50 | 77 | 80 | 80 |

5.

What is the overall percentage of Tarun?

Answer: Option

Explanation:

Aggregate marks obtained by Tarun

= [ (65% of 150) + (35% of 130) + (50% of 120)

+ ((77% of 100) + (80% of 60) + (80% of 40) ]

= [ 97.5 + 45.5 + 60 + 77 + 48 + 32 ]

= 360.

The maximum marks (of all the six subjects)

= (150 + 130 + 120 + 100 + 60 + 40)

= 600.

Overall percentage of Tarun = | 360 | x 100 | % = 60%. | ||

600 |

Discussion:

20 comments Page 2 of 2.
Tom said:
1 decade ago

Hey everyone, please help me out here with sg.

Why do we assume that the subjects are not equal, i.e. they need to be weighted according to the maximum amount of points achievable in each?

I believe that if I achieve 15% in maths and 90% in CS, my overall performance will be 15%+90%/2= 52,5% and not 30,78% (15%x150+90%x40)/190 - after all, this is only fair.

Sticking to my above example, if maths test was 150, and CS was 1000 points, my overall result would be a stunning 80,21%, which I think would be a bit unfair, considering that I have just failed maths miserably.

Let me know what you think.

Why do we assume that the subjects are not equal, i.e. they need to be weighted according to the maximum amount of points achievable in each?

I believe that if I achieve 15% in maths and 90% in CS, my overall performance will be 15%+90%/2= 52,5% and not 30,78% (15%x150+90%x40)/190 - after all, this is only fair.

Sticking to my above example, if maths test was 150, and CS was 1000 points, my overall result would be a stunning 80,21%, which I think would be a bit unfair, considering that I have just failed maths miserably.

Let me know what you think.

Varun said:
8 years ago

@Rita.

This 60 you got is average marks of all 6 subs if all subjects are of equal weight. Which is not asked in the question?

We need a percentage of marks (all sub having different weights) so we take aggregate.

Marks and divide by total marks achievable.

This 60 you got is average marks of all 6 subs if all subjects are of equal weight. Which is not asked in the question?

We need a percentage of marks (all sub having different weights) so we take aggregate.

Marks and divide by total marks achievable.

Rita said:
9 years ago

No, 360 are marks not % and we can do following calculations.

i.e 360/6 = 60 it is right.

i.e 360/6 = 60 it is right.

K.niharika said:
9 years ago

It will become 65%.

Jazz said:
9 years ago

@David.

Because 360 are not the marks 360 are the % that's why.

Because 360 are not the marks 360 are the % that's why.

DaVid Kawlni said:
9 years ago

Why not aggregate marks divided by total number of subjects:

i.e. 360/6 = 60.

i.e. 360/6 = 60.

Chaitanya said:
9 years ago

Percentage calculation simplification:

1% = 00 (two zeros) i.e. if we see one % symbol we can cancel two zeros.

If we find 2% symbols we can cancel zeros.

For ex: 90%150 = 9*15 = 135.

= 99%88 = 87.12.

1% = 00 (two zeros) i.e. if we see one % symbol we can cancel two zeros.

If we find 2% symbols we can cancel zeros.

For ex: 90%150 = 9*15 = 135.

= 99%88 = 87.12.

Banu said:
10 years ago

Please say some shortcut.

Navi said:
1 decade ago

How to make calculation easy for this sum?

Bhavhar said:
1 decade ago

Guys any shortcut for this sum?

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