Q342 · Practice questionTechnology-freeSimple familiar1 mark
QUESTION 342
Which experiment is suitable for an exact binomial model for the number of successes?
(A)
Twelve independent trials, each with success probability .
(B)
Drawing six red-or-blue counters without replacement from a small bag.
(C)
The number of attempts made before a player first succeeds.
(D)
Ten independent trials whose success probabilities are all different.
WORKED SOLUTION
1 markAnswer A
ANSWER
A
Worked solution
The first experiment has a fixed number of independent trials, two outcomes and a constant success probability. In the other experiments at least one of these conditions fails.
Exact answers unless rounding is specified; equivalent forms accepted. Retain unrounded intermediate values.
Selects the correct option.
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