Rainforest data: mean = 7  σ2 = 12.405  σ ≈ 3.522 when using the formula zx = x − μ σ for the z-score for the 11.7 data point: x = ; μ =

Mean B =μ= 7

Standard Deviation =A=σ ≈ 3.522

Variance =σ²=12.405

X=Score=Data Point=11.7

z-score for the Score 11.7

go on the tube you might find some information there

3-4

step-by-step explanation:

the answer is 3-4 because both 45 and 60 has a multiple of 15.

45/3=15

60/4=15

therefore the odds against selecting a red is 4-3