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A coin is tossed 500 times and we get ...

A coin is tossed 500 times and we get
heads : 285 times and tails : 215 times
When a coin is tossed at random , what is probability of getting
(i) a head ? (ii) a tail ?

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The correct Answer is:
To solve the problem step by step, we will calculate the probability of getting heads and tails when a coin is tossed based on the given data. ### Step-by-Step Solution: 1. **Identify the total number of tosses**: The total number of times the coin is tossed is given as 500. 2. **Count the number of heads**: The number of times heads appeared is given as 285. 3. **Count the number of tails**: The number of times tails appeared is given as 215. 4. **Calculate the probability of getting heads**: The probability of an event is calculated using the formula: \[ P(\text{Head}) = \frac{\text{Number of favorable outcomes (Heads)}}{\text{Total number of outcomes (Tosses)}} \] Substituting the values: \[ P(\text{Head}) = \frac{285}{500} \] Now, simplifying this fraction: \[ P(\text{Head}) = 0.57 \] 5. **Calculate the probability of getting tails**: Similarly, we calculate the probability of getting tails: \[ P(\text{Tail}) = \frac{\text{Number of favorable outcomes (Tails)}}{\text{Total number of outcomes (Tosses)}} \] Substituting the values: \[ P(\text{Tail}) = \frac{215}{500} \] Now, simplifying this fraction: \[ P(\text{Tail}) = 0.43 \] ### Final Answers: - (i) The probability of getting a head is **0.57**. - (ii) The probability of getting a tail is **0.43**.
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RS AGGARWAL-PROBABILITY-Exercise 19
  1. A coin is tossed 500 times and we get heads : 285 times and tails : ...

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  2. Two coins are tossed 400 times and we get two heads : 112 times, one...

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  3. Three coins are tossed 200 times and we get three heads, 39 times , ...

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  4. A die is thrown 300 times and the outcomes are noted as given below : ...

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  5. In a survey of 200 ladies , it was found that 142 like coffee , while...

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  6. The percentages of marks obtained by a student in six unit tests are g...

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  7. On a particular day , at a crossing in a city , the various types of 2...

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  8. On one page of a telephone directory , there were 200 phone numbers . ...

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  9. The following table shows the blood groups of 40 students of a class. ...

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  10. 12 packets of salt , each marked 2 kg , actually contained the followi...

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  11. In a cricket match , a batsman hits a boundary 6 times out of 30 balls...

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  12. An organisation selected 2400 families at random and surveyed them to ...

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  13. The table given below shows the marks out by 30 students in a test . ...

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  14. The table given below shows the ages of 75 teachers in a school . ...

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  15. Following are the ages (in years) of 360 patients , getting medical tr...

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  16. The marks obtained by 90 students of a school in mathematics out of 10...

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  17. It is known that a box of 800 electric bulbs contains 36 defective bul...

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  18. Fill in the blanks . (i) Probability of an impossible event= …….. ...

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