Q6 · 2020 · Technology-freeSimple familiar1 mark
QUESTION 6
If the probability of success in a Bernoulli trial is 0.30, the variance is
(A)
0.70
(B)
0.46
(C)
0.30
(D)
0.21
WORKED SOLUTION
1 markAnswer D
ANSWER
D
Worked solution
For a Bernoulli variable, . Hence D.
Selects option D.
Worked explanation by QCE Vault; correct option verified against the QCAA answer key.
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