If the "problem of 3 and a number " is multiplying:
If it's about adding:
Scenario A: If it's 3 and z, then that means it's 3, and we're adding 4, so it's
(make sure to put () around the 3
!)
Scenario B: If 3 and z is also 3+, then the equation is
(also use () on this too!)
Answer:
0.3960
Step-by-step explanation:
X - no of questions answered correct is binomial since each question is independent of the other and there are two outcomes
p = Prob of any one question right = 0.2 (1/5)
n = 44
Normal approximation would be mean = np = 8.8 and Variance = npq = 7.04
Std dev =
X is N(8.8,2.6534)
Or Z =
Since we approximate discrete to continuous continuity correction is to be applied
means x≥9.5
P(X≥9.5) = 0.3960