FINDING PROBABILITY OF AN EVENT WORKSHEET

(1)  You are walking along a street. If you just choose a stranger crossing you, what is the probability that his next birthday will fall on a Sunday?          Solution

(2)  What is the probability of drawing a King or a Queen or a Jack from a deck of cards?          Solution

(3)  What is the probability of throwing an even number with a single standard dice of six faces?          Solution

(4)  There are 24 balls in a pot. If 3 of them are Red, 5 of them are Blue and the remaining are Green then, what is the probability of picking out (i) a Blue ball, (ii) a Red ball and (iii) a Green ball?          Solution

(5)  When two coins are tossed, what is the probability that two heads are obtained?             Solution

(6)  Two dice are rolled, find the probability that the sum is i) equal to 1 ii) equal to 4 iii) less than 13           Solution

(7)  A manufacturer tested 7000 LED lights at random and found that 25 of them were defective. If a LED light is selected at random, what is the probability that the selected LED light is a defective one.           Solution

(8)  In a football match, a goalkeeper of a team can stop the goal, 32 times out of 40 attempts tried by a team. Find the probability that the opponent team can convert the attempt into a goal.           Solution

(9)  What is the probability that the spinner will not land on a multiple of 3?           Solution

(10)  Frame two problems in calculating probability, based on the spinner shown here.             Solution

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