Afish tank contains 14 goldfish 26 guppies. if you randomly select 2 fish what is the probility that they both are gold fish?
a.1/20
b. 1/26
c. 91/780
d. 1/384

Probability=(number of favorable outcomes)/(number of total outcomes)
A=select the first gold fish.
P(A)=14/40
B=select the second gold fish
P(B)=13/39

A∩B=select two fish gold

P(A∩B)=P(A)*P(B)=(14/40)*(13/39)=182/1560=91/780

C. 91/780

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)

For a 0.25 pfor b o.3pp (0.25+0.3)=0.28