Answer:
2, 3 and 7,8
Step-by-step explanation:
Answer:
6 or 3
Step-by-step explanation:
A. 12j and 42j
C. 17j³ + 18j³
This is because the variables and their powers are the same in these terms
To calculate this probability we must take into account that there is the same probability that any of the 3 urns is chosen.
This probability is:
P (U1) = P (U2) = P (U3) = 1/3
Urn 1 contains 7 black and 3 red marbles
Urn 2 contains 2 black and 8 marbles network
Urn 3 contains 5 black marbles and 5 red marbles.
The probability of obtaining a black marble in Urn 1 is 7/10.
The probability of obtaining a black marble in Urn 2 is 2/10
The probability of obtaining a black marble in Urn 3 is 5/10.
Then we look for the probability of obtaining a black marble from urn 1 or a black marble from urn 2 or a black marble from urn 3. This is:
P (U1yB) + P (U2yB) + P (U3yB)
So:
(1/3) * (7/10) + (1/3) * (2/10) + (1/3) * (5/10) = 0,2333 + 0,0667 + 0,1667 = 0, 4667.
The probability that it is a black marble is 46.67%
Answer:
-31
Step-by-step explanation:
hmmm
you go what is around parentheses but there as none so we'll just go with subtracting -9+-10 which will be which will be -19 then add and subtract -19 by 12 and thats -7
so asdd tho up and youll get -31
