Daily Practice - Higher

2 of 7 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.

Four classes in order have frequencies 7, 5, 5, 10. Write down the cumulative frequency at the end of the third class.

Write √12 in the form a √b, where b is as small as possible.Write sqrt(12) in the form a sqrt(b), where b is as small as possible.

4 teas and 4 cakes cost £21.00. 3 teas and 5 cakes cost £21.55. Find the price of a tea.

A block has volume 105 cm³ and density 4 g/cm³. Work out its mass.A block has volume 105 cm^3 and density 4 g/cm^3. Work out its mass.