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What is the probability of guessing correctly at least 8 out of 10 answer on true-false examination?
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Practice questions from similar books
Question 1
A factory has two machines A and B. Past record shows that machine A produced 60% of the items of output and machine B produced 40% of the items. Futher, 2% of the items produced by machine A and 1% produced by machine B were defective. All the items are put into one stockpile and then one item is chosen at random from this and is found to be defective. What is the probability that it was produced by machine B?Question 2
A speaks truth in 60% of the cases, while B in 90% of the cases. In what percent of cases are they likely to contradict each other in stating the same fact? In the cases of contradiction do you think, the statement of B will carry more weight as he speaks truth in more number of cases than A?Question 3
If two different dice are rolled together, the probability of getting an even number of both dice isQuestion 4
An urn contains 5 red and 2 green balls, one ball is chosen from urn. If it is red then a green ball is put back into Box, and if it green then a red ball is put in to box (previous ball was not put in that box). Then a second ball is drawn the probebility that it is red ball is (a) (b) (c) (d) Question Text | What is the probability of guessing correctly at least 8 out of 10 answer on true-false examination? |