Cards marked with numbers 3, 4, 5, ......, 50 are placed in a box and mixedthoroughly. One card is drawn at random from the box. Find the probability thatnumber on the drawn card is dividing by 7.
A coin is tossed three times, consider the following events.A : ‘No head appears’, B: ‘Exactly one head appears’ and C: ‘Atleast two appear’.Do they form a set of mutually exclusive and exhaustive events?
A die is thrown three times, if the first throw is a four, find the chance of getting 15 as the sum.
A pack of 52 cards is divided at random into two equals parts. Find the probability that both parts will have an equal number of black and red cards.
What is the probability of guessing correctly at least 8 out of 10 answer on true-false examination?
On her vacations Veena visits four cities (A,B,CandD)in a random order. What is the probability that she visits(i) A before B?(ii) A before B and B before C?(iii) A first and B last?(iv) A either first or second?(v) A just be
A bag contains lemon flavoured candies only. Malini takes out one candy without looking into the bag. What is the probability that she takes out(i) an orange flavoured candy?(ii) a lemon flavoured candy?
Which of the following arguments are correct and which are not correct? Give reasons for your answer.(i) If two coins are tossed simultaneously there are three possible outcomes two heads, two tails or one of each. Therefore, for each of these outcomes the probability is 1/3(ii)if a die is thrown, there are two possible outcomes, an odd no. or an even no. Therefore ,the probability of getting an odd no. is 1/2.
In an entrance test that is graded on the basis of two examinations, the probability of a randomly chosen student passing the first examination is 0.8 and the probability of passing the second examination is 0.7. The probability of passing atleast one of them is 0.95. What is the probability of passing both?