Among 27 external speakers, there are three defectives. An inspector examines 7 of these speakers.
Find the probability that there are at least 2 defective speakers among the 7
(round off to second decimal place).

SDCSSC S CD  DS D SDC SD CSD CDS S SA D SADS S  E FD F DD VDF V DFV DF V DFV DFV DS V DSVD V SD DS SD CDS C DV DF V DFV DF V DFV DF VDFV DFVD VDF V DFV D VDV DFV DFV DF

Step-by-step explanation:

VDFV D VDV D VDF D V  VFV DF VD   DF V D VFD

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!