When a certain type of thumbtack is tossed, the probability that it lands tip up is 20%, and the probability that it lands tip is 80%. All possible outcomes when two thumbtacks are tossed are listed. U means the tip is up and D means the tip is down.

All possible outcomes when two thumbtacks are tossed are listed

{ UU ,UD,DU,DD} here U means the tip is up and D means the tip is down.

The probabilities of all these possible outcomes are

{ p(UU) ,p(UD),p(DU),p(DD)} are {1/25 , 4/25 ,4/25 , 16/25}

Step-by-step explanation:

The probability that it lands tip up is 20% P(U) =  

The probability that it lands tip up is 80% P(D) =  

All possible outcomes when two thumbtacks are tossed are listed

{ UU ,UD,DU,DD} here U means the tip is up and D means the tip is down.

note:- The sum of all probabilities is equal to one

that is =

she gotta workk that a 2

step-by-step explanation:

step-by-step explanation:

we can use this expression to calculate the energy gain as a particle moves with a field or the energy loss as it moves against it. (note that it is also used to define the electron-volt, a unit of energy equal to that gained by an electron as it falls through a pd of 1 v, i.e. w = 1 ev = 1.6 10-19 c 1 v = 1.6 10-19j).in fact this expression is really nothing more than the statement that potential is the potential energy per unit charge. in this case, v= w/qis simply stating that the change in potential energy(or work done) per unit charge is equal to the change in potential (or potential difference), v.student questions: uniform electric fields2electron beamcathode+5 kvanode0 v