In a test (+5) marks are given for every correct answer and (–2) marks are given for every incorrect answer. (i) Radhika answered all the questions and scored 30 marks through 10 correct answers. (ii) Jaya also answered all the questions and scored (–12) marks through 4 correct answers. How many incorrect answers had both Radhika and Jaya attempted?

SCERT Class 7 Telangana, Maths Chapter 1 Integers

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Answers

2016-04-04T21:16:52+05:30
Radhika answered 10 correct answer.
she secure 50 marks for all the right answer.
each incorrect answer she get -2 marks.
finally she got 30 marks by getting 20 marks negative for answering 10 incorrect answer.

Jaya answered 4 correct answer.
she secure 20 marks for all the right answer.
each incorrect answer she get -2 marks.
finally she got -12 marks by getting 32 marks negative for answering 16 incorrect answer.

Therefore Radhika made 10 incorrect answer and Raya made 16 incorrect answer
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