Question

78. An urn contains 25 balls numbered
1 through 25. Two balls are drawn
from the urn with replacement. Find
the probability of selecting both odd
numbers.
(a)
(b)
13
25
26
50
169
625
13
(c)
(d)
50​

Answer 1

Answer:

Step-by-step explanation:

Let's denote success with S and getting an odd number with O.

Then P(S)=1−P(  

S

)

since from 1 to 25 there are 13 odd and 12 even

hence, P(O)=  

25

13

​  

andP(E)=  

25

12

​  

 

now P(  

S

)=P(O)P(E)

⇒P(  

S

)=(  

25

12

​  

×  

25

12

​  

)=  

625

144

​  

 

⇒P(S)=1−  

625

144

​  

=  

625

481

​  

Answer 2

Answer:

first one is correct you can write from it