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Alexeev081 [22]
2 years ago
13

Effectuer les calculs suivants en les décomposant.

Mathematics
1 answer:
marishachu [46]2 years ago
6 0

Answer:

A=24

B=20

C=10

please mark me as brainalist

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ramone has 5 difficult questions left to answer on a multiple choice test. Each question has 3 choices. For the first 2 of these
olchik [2.2K]
1. a b c
2. a b c
3. a b c
4. a b c
5. a b c

then she eliminated 1 choice in 1 and 2, say as follows

1.    b c
2. a b 
3. a b c
4. a b c
5. a b c

Probability of answering correctly the first 2, and at least 2 or the remaining 3 is 
P(answering 1,2 and exactly 2 of 3.4.or 5.)+P(answering 1,2 and also 3,4,5 )

P(answering 1,2 and exactly 2 of 3.4.or 5.)=
P(1,2,3,4 correct, 5 wrong)+P(1,2,3,5 correct, 4 wrong)+P(1,2,4,5 correct, 3 wrong)
also P(1,2,3,4 c, 5w)=P(1,2,3,5 c 4w)=P(1,2,4,5 c 3w )
so  
P(answering 1,2 and exactly 2 of 3.4.or 5.)=3*P(1,2,3,4)=3*1/2*1/2*1/3*1/3*2/3=1/4*2/9=2/36=1/18

note: P(1 correct)=1/2
         P(2 correct)=1/2
         P(3 correct)=1/3
         P(4 correct)=1/3
         P(5 wrong) = 2/3

P(answering 1,2 and also 3,4,5 )=1/2*1/2*1/3*1/3*1/3=1/108

Ans: P= 1/18+1/108=(6+1)/108=7/108
5 0
3 years ago
Plssssss answerrrrrrr
densk [106]
Don’t take my word for it but I think 3rd option
8 0
2 years ago
Skill in adding and subtracting decimals is useful for calculating ______ .
Sholpan [36]

Answer:

<u>the amount saved in buying a pair of $32.95 blue jeans on sale for $26.50</u>

Step-by-step explanation:

all are pretty good answers but that one is most reasonable

have a nice day :)

7 0
2 years ago
Read 2 more answers
My daughter need help on this and I am not good at telling time like that
Basile [38]

Answer:

7:42

Step-by-step explanation:

7 0
3 years ago
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1 and 1/4 divided by 7
ludmilkaskok [199]

Answer:

5/28 or 0.17857142

Step-by-step explanation:

use the calculator lol

4 0
3 years ago
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