Identify the formula used to calculate z-score. a. (Mean - Value)/Standard Deviation b. (Mean - Value)/(Mean + Value) c. (Value
- Mean)/Standard Deviation d. (Value - Mean)/Median
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Answer:
Answer is
Step-by-step explanation:
Given that there are two urns. First urn contains 3 white balls and 6 yellow balls and the second urn contains 7 white balls and 3 yellow balls.
A ball is drawn from each urn.
Probability for ball from urn I is white = no of white balls/total balls in I urn
Probability for ball from urn II is white = no of white balls/total balls in I urn
Since drawing one ball from each urn is independent of the other we find
Prob that both balls are white=
Prob that ball from I urn is white *Prob that ball from II urn is white
=