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You play a game that involves drawing two numbers from a hat. There are 25 pieces of paper numbered from 1 to 25 in the hat. Each number is replaced after it is drawn. Find the probability that you will draw the 3 on your first draw and a number greater than 10 on your second draw. Round your answer to the nearest tenth.about $\%$

Question

You play a game that involves drawing two numbers from a hat. There are 25 pieces of paper numbered from 1 to 25 in the hat. Each number is replaced after it is drawn. Find the probability that you will draw the 3 on your first draw and a number greater than 10 on your second draw. Round your answer to the nearest tenth.about %\%

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Solution

To solve this problem, we need to find the probability of two independent events happening in sequence.

  1. Probability of drawing a 3 on the first draw:

    • There is only one piece of paper with the number 3 out of 25 pieces of paper.
    • Therefore, the probability of drawing a 3 on the first draw is: P(First draw is 3)=125 P(\text{First draw is 3}) = \frac{1}{25}
  2. Probability of drawing a number greater than 10 on the second draw:

    • Numbers greater than 10 are 11, 12, 13, ..., 25. There are 15 such numbers.
    • Since the number is replaced after the first draw, the total number of pieces of paper remains 25.
    • Therefore, the probability of drawing a number greater than 10 on the second draw is: P(Second draw is greater than 10)=1525=35 P(\text{Second draw is greater than 10}) = \frac{15}{25} = \frac{3}{5}
  3. Combined probability of both events happening:

    • Since the two events are independent, we multiply their probabilities: P(First draw is 3 and second draw is greater than 10)=P(First draw is 3)×P(Second draw is greater than 10) P(\text{First draw is 3 and second draw is greater than 10}) = P(\text{First draw is 3}) \times P(\text{Second draw is greater than 10}) =125×35=1×325×5=3125 = \frac{1}{25} \times \frac{3}{5} = \frac{1 \times 3}{25 \times 5} = \frac{3}{125}
  4. Convert the probability to a percentage:

    • To convert the fraction to a percentage, we multiply by 100: 3125×100=2.4% \frac{3}{125} \times 100 = 2.4\%

Therefore, the probability that you will draw the 3 on your first draw and a number greater than 10 on your second draw is approximately 2.4%.

This problem has been solved

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