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A bag contains 4 red, 5… (Class 10 Maths Basic 2024, Q25)

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MathsCBSE Class 10 · Basic · Board exam 2024, set 430/1/1 · 2 marks · Very short answer

CBSE Class 10 Mathematics Basic 2024: question 25

Set in the CBSE Class 10 board exam of 2024, paper 430/1/1, section B, question 25, for 2 marks. Try it first; the hints and our step-by-step solution are below.

Q25 · 2 marks · Very short answerProbability

A bag contains 4 red, 5 white and some yellow balls. If probability of drawing a red ball at random is , then find the probability of drawing a yellow ball at random.

Source: official question paper from cbse.gov.in (PDF). See it in the full 2024 board paper, set 430/1/1.

Hints

Open one hint at a time and try again before the next.

Hint 1

Let the unknown number of yellow balls be n and write the total number of balls.

Hint 2

Equate to to find n.

Step-by-step solution

Each step shows the marks it earns, as an examiner would award them. Checked by an independent re-solve from the question paper.

  1. Let the number of yellow balls be . Total balls .

  2. 1½ marks

  3. ½ mark

Answer:

Where the marks are

  • Forms and gets (1½ marks)
  • (½ mark)

Revise the chapter

Practise this chapterBoard-style questions from Probability, one at a time, marked against the answer key and marking points.Back to the full paper2024 board paper, set 430/1/1 (Basic): every question, by section.

The question is transcribed from the official paper; figures are described in words. The solution, hints and chapter tag are ours. Spotted an error? Write tosupport@questionbuddy.in.