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Alex
3 years ago
8

PLEASE RESPOND.

Mathematics
2 answers:
bagirrra123 [75]3 years ago
8 0

Answer:

Step-by-step explanation:

Given that Rita is making a beaded bracelet. She has a collection of 160 blue beads, 80 gray beads, and 240 pink beads. We are to calculate the probability that Rita will need to pick atleast 5 beads before she picks a grey bead from her collection.

Prob for drawing atleast 5 beads before she picks a grey bead from her collection

= 1-Prob for drawing atleast one grey beed in the first 5 draws.

(Because these two are complementary events)

no of grey beeds drawn in first 5 trials is

Bin(5,\frac{80}{80+160+240} \\=(5,\frac{1}{6} )

Prob for drawing atleast one grey beed in the first 5 draws.

=1-Prob of no grey

Hence required prob=P(X=0 in first 5 draws)

= (1-\frac{1}{6} )^5\\=0.4018

6th beeds onwards can be grey also.

Nearest answer is c)0.45

Phoenix [80]3 years ago
4 0
The answer could be 0.45
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