KCSE MATHEMATICS QUESTIONS AND SOLUTIONS ~ Topically Analyzed
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Form 3 Mathematics
A student at a certain college has a 60% chance of passing an examination at the first attempt. Each time a student fails and repeats the examination his chances of passing are increased by 15%
Calculate the probability that a student in the college passes an examination at the second or at the third attempt.
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Form 3 Mathematics
Two bags A and B contain identical balls except for the colours. Bag A contains 4 red balls and 2 yellow balls. Bag B contains 2 red balls and 3 yellow balls.
(a) If a ball is drawn at random from each bag, find the probability that both balls are of the same colour. (b) If two balls are drawn at random from each bag, one at a time without replacement, find the probability that: (i) The two balls drawn from bag A or bag B are red (ii) All the four balls drawn are red Form 3 Mathematics
(a) Two integers x and y are selected at random from the integers 1 to 8. If the
same integer may be selected twice, find the probability that (i) x – y = 2 (ii) x – y is more (iii) x>y (b) A die is biased so that when tossed, the probability of a number r showing up, is given by p ® = Kr where K is a constant and r = 1, 2,3,4,5 and 6 (the number on the faces of the die (i) Find the value of K (ii) if the die is tossed twice, calculate the probability that the total score is 11 Form 3 Mathematics
The probability of three darts players Akinyi, Kamau, and Juma hitting the bull's eye are 0.2, 0.3 and 1.5 respectively.
Form 3 Mathematics
A poultry farmer vaccinated 540 of his 720 chickens against a disease. Two months later, 5% of the vaccinated and 80% of the unvaccinated chicken, contracted the disease. Calculate the probability that a chicken chosen random contacted the disease.
Form 3 Mathematics
Three representatives are to be selected randomly from a group of 7 girls and 8 boys. Calculate the probability of selecting two girls and one boy.
Form 3 Mathematics  Topical Questions and AnswersIn form 1 class there are 22 girls and boys. The probability of a girl completing the secondary education course is 3 whereas that of a boy is ⅔
Related Questions on ProbabilityFree 1999 K.C.S.E Mathematics Topical Question & Answers Paper 1
Two baskets A and B each contain a mixture of oranges and limes, all of the same size. Basket A contains 26 oranges and 13 limes. Basket B contains 18 oranges and 15 limes. A child selected a basket at random and picked a fruit at a random from it.
Free 1998 K.C.S.E Mathematics Topical Question & Answers Paper 2
A science club is made up of boys and girls. The club has 3 officials. Using a tree diagram or otherwise find the probability that:
If a fowl is treated, probability of dying is ^{1} ⁄ _{10} while if not treated the probability is ^{7} ⁄ _{10} calculate the probability that, a fowl picked at random from the 36 fowl is
In a livestock research stations a new drug for a certain fowl disease is being tried. A sample of 36 fowls were diagnosed to have the disease. Twenty (20) fowls were treated with the drug and the rest were not.
ANSWER
The probabilities that a husband and wife will be alive 25 years from now are 0.7 and 0.9 respectively.Find the probability that in 25 years time,
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