NCERT Exemplar Solutions
Class 10 - Mathematics - CHAPTER 13: Statistics and Probability - Exercise 13.2
Question 11

Question. 11

If you toss a coin 6 times and it comes down heads on each occasion. Can you say that the probability of getting a head is 1? Give reasons.

Answer:

False

Detailed Answer with Explanation:

Step 1: Recall the basic rule of probability. For a fair coin, there are two equally likely outcomes: Head (H) or Tail (T).

Step 2: The probability of getting a head in one toss is:

\( P(H) = \dfrac{1}{2} = 0.5 \)

Step 3: Every coin toss is independent. This means that what happened in the past (for example, 6 heads in a row) does not change the probability of the next toss.

Step 4: Even if you got 6 heads in a row, the probability of getting a head in the 7th toss is still:

\( P(H) = \dfrac{1}{2} \)

Step 5: If the probability of head were 1, that would mean it is certain to get a head every time, which is not true for a fair coin.

Conclusion: The probability of getting a head is always \(0.5\), not 1, regardless of how many heads appeared before.

NCERT Exemplar Solutions Class 10 – Mathematics – CHAPTER 13: Statistics and Probability – Exercise 13.2 | Detailed Answers