The two values are positive 9 and negative 9
Answer:
6
Step-by-step explanation:
probability of answering a question correct p=1/4
let minimum number number of question that would be unusual =n
hence from binomial distribution P(X>=n) <0.05
by solving:
n=6
it would be unusual to get 6 or more questions correct by guessing alone.
Answer:
10
Step-by-step explanation:
Out of the ten cards she has ten chances to pick each one
A
to calculate the slope m use the gradient formula
m = ( y₂ - y₁ ) / (x₂ - x₁ )
with (x₁, y₁ ) = (7, - 2 ) and (x₂, y₂ ) = (- 1, - 5 )
m = = = → A