Mathematics for IGCSE & O level - Probability (Section 5 - No. 42)
If there are 5 blue pens and 5 red pens, what is the probability of Basma picking a blue pen? (Basma picks one pen).
1/5
1/10
1/2
2/5
Giải thích
There are 5 blue pens out of 10 total pens. Probability is 5/10 = 1/2.