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  • Question
  • The probability of getting a composite number when a six-faced unbiased die is tossed, is


  • Options
  • A. 1/4
  • B. 1/3
  • C. 1/2
  • D. 1

  • Correct Answer
  • 1/3 

    Explanation

    n(S) = 6, n(E) = (4, 6) = 2
    ? P(E) = 2/6 = 1/3


  • More questions

    • 1. From a tank of petrol , which contains 200 liters of petrol, the seller replaces each time with kerosene when he sells 40 liters of petrol(or mixture). Everytime he sells out only 40 liters of petrol (pure or impure). After replacing the petrol with kerosene 4th time, the total amount of kerosene in the mixture is

    • Options
    • A. 81.92L
    • B. 96L
    • C. 118.08L
    • D. None of these
    • Discuss
    • 2. A jar was full with honey. A person used to draw out 20% of the honey from the jar and replaced it with sugar solution. He has repeated the same process 4 times and thus there was only 512 gm of honey left in the jar, the rest part of the jar was filled with the sugar solution. The initial amount of honey in the jar was filled with the sugar solution. The initial amount of honey in the jar was:

    • Options
    • A. 1.25 kg
    • B. 1 kg
    • C. 1.5 kg
    • D. None of these
    • Discuss
    • 3. Shiva purchased 280 kg of Rice at the rate of 15.60/kg and mixed it with 120 kg of rice purchased at the rate of 14.40/kg. He wants to earn a profit of Rs. 10.45 per kg by selling it. What should be the selling price of the mix per kg?

    • Options
    • A. Rs. 22.18
    • B. Rs. 25.69
    • C. Rs. 26.94
    • D. Rs. 27.54
    • Discuss
    • 4. 
      Six bells commence tolling together and toll intervals of 2, 4, 6, 8, 10 and 12 seconds respectively. In 30 minutes, how many times do they toll together?

    • Options
    • A. 4
    • B. 10
    • C. 15
    • D. 16
    • Discuss
    • 5. The milk and water in two vessels A and B are in the ratio 4:3 and 2:3 respectively. In what ratio the liquids in both the vessels be mixed to obtain a new mixture in vessel c consisting half milk and half water?

    • Options
    • A. 8:3
    • B. 6:7
    • C. 7:5
    • D. 11:7
    • Discuss
    • 6. A man pays Rs. 6.40 per litre of milk. He adds water and sells the mixture at Rs. 8 per litre, thereby making 37.5% profit. The proportion of water to milk received by the customers is

    • Options
    • A. 1 : 10
    • B. 10 : 1
    • C. 9 : 11
    • D. 11 : 9
    • Discuss
    • 7. An alloy of copper and bronze weight 50g. It contains 80% Copper. How much copper should be added to the alloy so that percentage of copper is increased to 90%?

    • Options
    • A. 45 gm
    • B. 50 gm
    • C. 55 gm
    • D. 60 gm
    • Discuss
    • 8. From the 50 liters of milk, 5 liters of milk is taken out and after it 5 liters of water is added to the rest amount of milk. Again 5 liters of milk and water is drawn out and it was replaced by 5 liters of water. If this process is continued similarly for the third time, the amount of milk left after the third replacement:

    • Options
    • A. 45L
    • B. 36.45L
    • C. 40.5L
    • D. 42.5L
    • Discuss
    • 9. From a container of wine, a thief has stolen 15 liters of wine and replaced it with same quantity of water.He again repeated the same process. Thus in three attempts the ratio of wine and water became 343:169. The initial amount of wine in the container was:

    • Options
    • A. 75 liters
    • B. 100 liters
    • C. 150 liters
    • D. 120 liters
    • Discuss
    • 10. In a 100 litre of mixture the ratio of milk and water is 6:4. How much milk must be added to the mixture in order to make the ratio 3 : 1?

    • Options
    • A. 85
    • B. 60
    • C. 55
    • D. 45
    • Discuss


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