MHB Probability of 4-Quarter Flips: Outcomes & Expected Value/Std Dev

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(a).Four quarters were flipped at a time and we know there are 16 possible outcomes.
(i).List all the possible outcomes of the sample space of the experiment above.
(3
(b). X is defined as the random variable of getting heads on a flip of these four quarters. Find the probability of getting
(i). Exactly no heads.
(ii).Exactly one head.
(iii).Exactly two heads.
(iv).Exactly three heads.
(v).Exactly four heads.
(c). (i).Represent the probability distribution of X in (b) above in a table form and use your table to answer the following.
(ii).Find the expected value of X.
(III). Find the standard deviation of X.

Pleasee need help this jst one problem messing me up
 
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Hello and welcome to MHB, lightningzcobra! :D

Interesting username...any relation to products from SVT? (Wink)

Can you show us what you have tried so far so our helpers have a better idea where you are stuck and what you may be doing wrong?
 

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