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(1) In a competitive exam consisting of 100 questions, each correct answer gets

2 marks and each wrong answer gets -1 mark.

Question

(1) In a competitive exam consisting of 100 questions, each correct answer gets

2 marks and each wrong answer gets -1 mark. If a student has written 70 correct

answers and 30 wrong answers, what is his/her score?

(2) A submarine has gone 4000 ft deep into the sea. If it rises at a rate of 30 ft

per minute what is its position after 45 minutes?

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Mathematics
2 years
2021-07-08T03:52:34+00:00
2021-07-08T03:52:34+00:00 1 Answers
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## Answers ( )

Answer:Step-by-step explanation:1)

Correct answers: 2 x 70 = 140 correct answers.

Incorrect answers: 30 x -1 = -30

Total correct answers = 2 x 100 = 200

140/200 = x/100

x = 70

The person’s score is 70%.

2) 30 feet more minute

We have gone through 45 minutes

so, 30 x 45 = 1350 ft.

It’s position after 45 minutes is 1350 ft.