Question

A bag contains 4 red and 5 black balls. If two balls are drawn in succession, then find the probability that they are two red balls when (a) with replacement, (b) without replacement​

Answer 1

Answer:

Xylem is one of the two types of transport tissue in vascular plants, the other being phloem. The basic function of xylem is to transport water from roots to stems and leaves, but it also transports nutrients.[1][2] The word "xylem" is derived from the Greek word ξύλον (xylon), meaning "wood"; the best-known xylem tissue is wood, though it is found throughout a plant.[3] The term was introduced by Carl Nägeli in 1858.

Step-by-step explanation:

ED Design Torq

Answer 2

the drawn ball is replaced before the second drawn

let us consider A be drawn the red ball at first draw

B drawn the red ball at the second draw for the event A

n=9c1=9

m=4c1= 4

p(A)=m/n=4/9

for the event B

n=9c1=9

m=4c1=4. [°•° the balls are replaced]

p(B)= m/n=4/9

probability of drawing balls are red balls in 2 drawings

p(AπB) =p(A).p(B)

=(4/9).(4/9)

= 16/81