Three letters to each of which corresponds an envelope are placed in the envelopes at random. The probability that all letters are not placed in the right envelope will be
A. 1/3
B. 2/3
C. 5/6
D. 1/13
Answer: Option C
Related Questions on Agricultural Statistics
A. Field trails
B. Exhibitions
C. Competition
D. Fair
The intelligency, ability or efficiency can be measured by use of
A. Median
B. G.M.
C. Weighted H.M.
D. Geometric mean
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