Kenya KCSE · Mathematics
Statistics, commercial arithmetic and loci
6 practice questions, each with the answer and an explanation.
Practise Statistics, commercial arithmetic and loci now
Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.
All 6 questions
- A man earns a monthly salary of KSh 80,000. Tax is charged at 10% on the first KSh 24,000, 25% on the next KSh 8,000 and 30% on the rest. What is the tax before any relief?
- The marks of 5 students are 3, 5, 6, 8 and 13. What is the standard deviation, correct to 2 decimal places?
- A bag contains 4 red and 6 green balls. Two are drawn at random with replacement. What is the probability of one of each colour?
- A trader buys 40 kg of rice at KSh 120 per kg and 60 kg at KSh 140 per kg and mixes them. At what price per kg should the mixture be sold to make a profit of 20 percent?
- A tank can be filled by one pipe in 6 hours and by a second pipe in 4 hours. How long do both take to fill the empty tank together?
- A rectangle measures 12.5 cm by 8.4 cm, each correct to 1 decimal place. What is the smallest possible area, correct to 1 decimal place?
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