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A student got twice as many sums wrong a...

A student got twice as many sums wrong as he got right. If he attempted 48 sums in all, how many did he solve correctly?

A

16

B

20

C

25

D

15

Text Solution

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The correct Answer is:
A
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If 6 marks are awarded to right answer and 3 marks are penalty for wrong answer. Then Prabhat's score was 120. If he attempted 50 questions then find number of correctly attempted questions ?

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In a class test (+ 3) marks are given for every correct answer and (–2) marks are given for every incorrect answer and no marks for not attempting any question. (i) Radhika scored 20 marks. If she has got 12 correct answers, how many questions has she attempted incorrectly? (ii) Mohini scores –5 marks in this test, though she has got 7 correct answers. How many questions has she attempted incorrectly? (iii) Rakesh scores 18 marks by attempting 16 questions. How many questions has he attempted correctly and how many has he attempted incorrectly

ARIHANT PUBLICATION PUNJAB-SOLVED PAPER 2018-SECTION D MATHEMATICS
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  2. For evaluation, a teacher should use

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  3. If a^(2) +(1)/(a^(2)) = 2, then a - (1)/(a) = ?

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  4. The median of the data 3, 5, 9, 10, 11,4,5, 8, 12, 15 is

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  5. Trigonometry is related to triangles in the same way as mensuration is...

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  6. Choose the number which is different from others

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  7. A number is greater than 3 but less than 8. Also, it is greater than 6...

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  8. If '+' means 'div', '-' means 'xx, 'div' means '+' means and 'xx' mean...

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  9. A person claims 15 for each Kilometer which he travels by Taxi and 5 f...

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  10. In an examination, a student scores 4 marks for every correct answer a...

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  11. The word which is least like the other words in the group is

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  12. Problems in Teaching Mathematics is due to

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  13. Remedial teaching is useful in finding

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  14. The Mathematical formulae can be deduced by

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  15. The purpose of giving homework to students is

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  16. The square of -0.02 is

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  17. HCF of polynomials x^(2) - y^(2) and x^(3) - y^(3) is

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  18. A sum of 3300 is shared between Ram, Ramesh, Rahim and Ravinder. Ram g...

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  19. If a:b= 2:3 and b:c= 5:6, then a:b:cis

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  20. Two poles of height 7 m and 12 m stand on a playground. If the distanc...

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  21. Mathematics is the science of

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