2025 - DUE 15 August 2025; 100% correct solutions
and explanations.
SECTION A: PROBABILITY
QUESTION 1
1.1 A bag contains 10 marbles: 3 red, 4 blue, 2 green, 1 yellow
1.1.1 Theoretical Probability
Theoretical probability = (Number of favourable outcomes) ÷ (Total number of
outcomes)
1.1.1.1 𝑃(𝑅𝑒𝑑) = 3/10
1.1.1.2 𝑃(𝐵𝑙𝑢𝑒) = 4/10 = 2/5
1.1.1.3 𝑃(𝐺𝑟𝑒𝑒𝑛) = 2/10 = 1/5
1.1.1.4 𝑃(𝑌𝑒𝑙𝑙𝑜𝑤) = 1/10
✅ (4 marks)
1.1.2 Experimental Trial Table
Perform the experiment 14 times, drawing one marble at a time with replacement.
Let’s assume these were the 14 outcomes:
Red, Blue, Green, Blue, Yellow, Blue, Red, Blue, Green, Blue, Red, Blue, Yellow,
Blue
Now, record the tallies and frequencies:
Colour Drawn Tally Frequency
Red
Blue
Green
Yellow