In sm.smiths class 75% of the students are girls.there are 18 girls in the class.what is the total number of students in ms.mith
2 answers:
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Answer:
c = 72
Step-by-step explanation:
multiply both sides of the equation by 8 to eliminate the fraction
c = 8 × 9 = 72
note that = 9
Answer:
330
Step-by-step explanation:
When we are at 30 degrees on the unit circle, we are at the point (/2, 1/2) so if we go to -30 degrees (330 degrees), we will be at point (-
/2, -1/2).
Note: (cosine, sine)
Answer:
S = {0,2,3,4}
P(X=0) = 0.573 , P(X=2) = 0.401 , P(x=3) = 0.025, P(X=4) = 0.001
Mean = 0.879
Standard Deviation = 1.033
Step-by-step explanation:
Let the number of people having same birth month be = x
The number of ways of distributing the birthdays of the 4 men = (12*12*12*12)
The number of ways of distributing their birthdays = 12⁴
The sample space, S = { 0,2,3,4} (since 1 person cannot share birthday with himself)
P(X = 0) =
P(X=0) = 0.573
P(X=2) = P(2 months are common) P(1 month is common, 1 month is not common)
P(X=2) =
P(X=2) = 0.401
P(X=3) =
P(x=3) = 0.025
P(X=4) =
P(X=4) = 0.001
Mean,
Standard deviation,
SD = 1.033