Daily Practice - Foundation Plus

Red and blue sweets are in the ratio 2 : 7. There are 10 red sweets. How many sweets are there altogether?

a is the column vector (0, 7) and b is (3, 7). Work out a + b as a column vector.

2 of 8 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.

Grouped data has five classes of width 10, the first being 40 < x ≤ 50. The frequencies in order are 21, 3, 16, 11, 7. Write down the modal class.Grouped data has five classes of width 10, the first being 40 < x <= 50. The frequencies in order are 21, 3, 16, 11, 7. Write down the modal class.

A number y is 65 when truncated to the nearest whole number. Write down the error interval for y.