Daily Practice - Higher

3 of 5 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.

A box plot has minimum 14, lower quartile 23, median 25, upper quartile 28 and maximum 33. Work out the interquartile range.

Write √8 in the form a √b, where b is as small as possible.Write sqrt(8) in the form a sqrt(b), where b is as small as possible.

The curve y = 5^x is drawn. Work out y when x = 1, and write down where the curve crosses the y-axis.The curve y = 5^x is drawn. Work out y when x = 1, and write down where the curve crosses the y-axis.

y is directly proportional to x². When x = 2, y = 24. Work out y when x = 5.y is directly proportional to x^2. When x = 2, y = 24. Work out y when x = 5.