Answer:
2 × - 1
Step-by-step explanation:
Answer:
10. answer= 3
Q11 answer = -3
Step-by-step explanation:
Q10.
-3x+9-x+9=3x-3
or, -4x+18=3x-3
or, 3x+4x=18+3
or, 7x=21
or, x=3 <u>answer</u>
<u>Q</u><u>1</u><u>1</u><u>.</u>
1.8-3.7x= -4.2x+0.3
or, 4.2x-3.7x=0.3-1.8
or, 0.5x= -1.5
or, x=-3 <u>answer</u>
Answer:
A. 0.1035
B. 0.1406
C. 0.1025
Step-by-step explanation:
Given that:
the number of sample questions (n) = 5
The probability of choosing the correct choice (p) = 1/4 = 0.25
Suppose X represents the number of question that are guessed correctly.
Then, the required probability that she gets the majority of her question correctly is:
P(X>2) = P(X=3) + P(X =4) + P(X = 5)
P(X>2) = [ 0.0879 + 0.0146 + 0.001 ]
P(X>2) = 0.1035
B.
Recall that
n = 5 and p = 0.25
The probability that the first Q. she gets right is the third question can be computed as:
Since, x = 3
P(X=3) = 0.1406
C.
The probability she gets exactly 3 or exactly 4 questions right is as follows:
P(X. 3 or 4) = P(X =3) + P(X =4)
P(X = 3 or 4) = [ 0.0879 + 0.0146 ]
P(X=3 or 4) = 0.1025
Answer:x = 56
Step-by-step explanation:
180-(60+64)=56