A bag contains 7 red marbles and 3 blue marbles

MATHEMATICS · Single correct · GCSE · Mathematics · Probability · Probability

Problem

A bag contains 7 red marbles and 3 blue marbles. One marble is drawn at random. What is the probability that the marble drawn is not blue? (a)

\dfrac{3}{10}

(b)

\dfrac{2}{5}

(c)

\dfrac{7}{10}

(d)

\dfrac{1}{2}