Daily Practice - Higher

1 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 4, lower quartile 7, median 10, upper quartile 20 and maximum 28. Work out the interquartile range.

Write 4^-1 as a fraction.Write 4^-1 as a fraction.

The curve y = 2^x is drawn. Work out y when x = 5, and write down where the curve crosses the y-axis.The curve y = 2^x is drawn. Work out y when x = 5, 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 = 4.y is directly proportional to x^2. When x = 2, y = 24. Work out y when x = 4.