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Probability Trees

P(\text{both red}) = 0.6 \times 0.6 = 0.36

P(both red)0.36

P(both blue)0.16

P(one of each)0.48

P(at least one red)0.84

Red balls3

Blue balls2

Replacement (0 without · 1 with)1

Set up the bag so P(both red) = 0.25
Switch to drawing WITHOUT replacement
Make P(one of each colour) = 0.50
Without replacement, make P(both red) = 0.20
Make P(at least one red) = 0.75