Find the standard deviation

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Questions

Q1. In the last two weeks of a sale, prices are reduced first by 30% and then by a further 40% of the new price. What is the final sale price of a shirt which originally costs $15?

Q2. Use matrices to solve the following system of equations: 2x + y = 5 3x - 2y = 4

Q3. Two boys have $176 between them. If the first gave the second $7, they would each have the same amount of money. How much money did each boy have?

Q4. Two numbers differ by 3. The sum of their reciprocals is - . Find the numbers. 10

Q5. The number of attendees at recent children's soccer games is given by 7. 9, 18, 22, 27, 29, 32, 40 Find the standard deviation.

Q6. When $143 is divided in the ratio 2 : 4 : 5, what is the difference between the largest share and the smallest share?

Reference no: EM132845707

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