Suppose an experiment consists of randomly generating the digits 1-9. lf the experiment were repeated 90 times, how many times would you predict the generated digit to be odd?

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Answer 1 · 2016-07-12T09:50:10

The predicted number of odd results is #50#

To calculate the expected number of successful results you use the formula

#E(X)=nxxp#

where:

#n# is the number of all generated digits
#p# is the probability of getting an odd number in a single draw.

In the given xperiment #n=90# and #p=5/9# because among digits #1-9# there are #5# odd digits: #1,3,5,7,9#

#E(X)=90xx5/9=10xx5=50#