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Probability

Short Answer Type

151. Cards bearing numbers 3 to 20 are placed in a bag and mixed thoroughly. A card is taken out from the bag at random. What is the probability that the number on the card taken out is an even number.

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152. A die is thrown once. Find the probablity of setting ‘a’ prime number.

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153. A die is thrown once. Find the probability of gettings ‘a number divisible by 2.’

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154.

A die thrown once. Find the probability of getting
(i) an even prime number
(ii) a multiple of 3

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155. A bag contain 4 red and 5 white balls. Two balls are drawn at random. Write the sample space.

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156. From a goup of 3 boys and 3 girls. If we select one child write the sample space of this experiment.

left square bracket straight B subscript 1 comma space straight B subscript 2 comma space straight B subscript 3 comma space straight G subscript 1 comma space straight G subscript 2 right square bracket

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157. What is the combine probability of a favorable and unfavorable event.

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158. If P (E) 0.58 write P(E)

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159. If E is an event such that P(E) =

2 over 7

write 1 - P

open parentheses top enclose straight E close parentheses

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160. If probability of success is 34%. What is the probability of failure.

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