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  • Question
  • Out of 100 families in the neighborhood, 50 have radios, 75 have TVs and 25 have VCR. Only 10 families have all three and each VCR owner also has a TV. If some families have radio only, how many have only TV?


  • Options
  • A. 30
  • B. 35
  • C. 40
  • D. 45

  • Correct Answer
  • 35 

    Explanation

    Let us assume that the N number of people have only TV.
    According to question,
    ? (40 ? P) + P + 10 + 15 + (50 ? P) = 100
    ? 115 ? 2P + P = 100
    ? P = 115 ? 100 = 15
    ? Only TV = 75 ? 15 ? 10 ? 15 = 35


  • More questions

    • 1. 
      Three number are in the ratio 4 : 5 : 6 and their average is 25. The largest number is?

    • Options
    • A. 42
    • B. 36
    • C. 30
    • D. 32
    • Discuss
    • 2. 
      A card is drawn at random from a pack of 52 cards. A card is drawn at random. What is the probability that it is neither a heart nor a king?

    • Options
    • A. 4/13
    • B. 9/13
    • C. 2/13
    • D. 4/13
    • Discuss
    • 3. 
      If three caps are picked at random, what is the probability that two are red and one is green?

    • Options
    • A. 9/22
    • B. 6/19
    • C. 1/6
    • D. 3/22
    • Discuss
    • 4. 
      If three balls are picked at random, what is the probability that atleast one is red?

    • Options
    • A. 1/2
    • B. 7/12
    • C. 11/12
    • D. 1/5
    • Discuss
    • 5. 
      150 m long train running with the speed of 90 km/h to cross a bridge in 26 s .What is the length of the bridge?

    • Options
    • A. 500 m
    • B. 600 m
    • C. 659 m
    • D. 550 m
    • Discuss
    • 6. 
      If two caps are picked at random, what is the probability that both are blue?

    • Options
    • A. 1/6
    • B. 1/10
    • C. 1/12
    • D. None of these
    • Discuss
    • 7. 
      If two marbles are picked at random, what is the probability that either both are green or both are yellow?

    • Options
    • A. 5/91
    • B. 1/35
    • C. 1/3
    • D. 4/105
    • Discuss
    • 8. 
      3/5 of 4/7 of 7/9 of 425

    • Options
    • A. 121
    • B. 118
    • C. 113
    • D. 110
    • Discuss
    • 9. 
      A horse and a cow were sold for Rs. 12000 each. The horse was sold at a loss of 20% and the cow at a gain of 20%. The entire transaction resulted in?

    • Options
    • A. No loss or gain
    • B. Loss of Rs . 1000
    • C. Gain of Rs.. 1000
    • D. Gain of Rs. 2000
    • Discuss
    • 10. 
      A thief running at 8 km/h is chased by a policeman whose speed is 10 km/h. If the thief is 100 m ahead of the policeman, then the time required for the policeman to catch the thief will be

    • Options
    • A. 2 min
    • B. 3 min
    • C. 4 min
    • D. 6 min
    • Discuss


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