10th Class Math Periodical Exam
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Questions and Answers

A card is drawn from a deck of 52 cards. The event E is that card is not an ace of hearts. The number of outcomes favourable to E is

  • 13
  • 39
  • 51
  • 48 (correct)
  • When a die is thrown, the probability of getting an odd number less than 3 is

  • 2/3
  • 1/6 (correct)
  • 1/2
  • 1/3
  • A single letter is selected at random from the word PROBABILITY. The probability that the selected letter is a vowel is

  • 3/11 (correct)
  • 3/10
  • 2/5
  • 1/5
  • There are 1000 sealed envelopes in a box. 10 of them contain a cash prize of Rs 100 each, 100 of them contain a cash prize of Rs 50 each and 200 of them contain a cash prize of Rs 10 each and rest do not contain any cash prize. If they are well-shuffled and an envelope is picked up, then the probability that it contains no cash prize is

    <p>0.54</p> Signup and view all the answers

    In a frequency distribution, the mid-value of a class is 10 and the width of the class is 6. The lower limit of the class is

    <p>8</p> Signup and view all the answers

    A set of numbers consists of three 4's, five 5's, six 6's, eight 8's and seven 10's. The mode of this set of numbers is

    <p>6</p> Signup and view all the answers

    Consider the data CI 65-85, 85-105, 105-125, 125-145, 145-165, 165-185, 185-205. The difference of the upper limit of the median class and the lower limit of the modal class is

    <p>20</p> Signup and view all the answers

    The sum of exponents of prime factors in the prime-factorisation of 196 is

    <p>3</p> Signup and view all the answers

    What is the probability of getting at most 3 heads?

    <p>3/4</p> Signup and view all the answers

    What is the probability of getting at least 3 heads?

    <p>1/8</p> Signup and view all the answers

    How often will there be trains on all three lines departing the train station at the same time?

    <p>Every 120 minutes</p> Signup and view all the answers

    What is the probability that the card drawn is a black king?

    <p>1/52</p> Signup and view all the answers

    What is the mode of the given data?

    <p>40-50</p> Signup and view all the answers

    What is the value of x if the mean of the 50 observations is 132?

    <p>12</p> Signup and view all the answers

    How many maximum guests can Lavanya invite if she distributes fruits equally among all?

    <p>30</p> Signup and view all the answers

    How many total fruits will each guest get if Lavanya adds 42 mangoes and removes 6 apples?

    <p>4</p> Signup and view all the answers

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