Answer:
78 boys
Step-by-step explanation:
If the raio is 2:3 that means there are 5 equal parts
56/2 28
3 x 28 = 78
Answer:
C
Step-by-step explanation:
Everything else can be simplified to 2/5, except for 9/20
Answer:
answer is 103
Step-by-step explanation:
25+52+x=180
x=77
subtract 180 - 77 = 103
answer is 103
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Answer:
Z-score = -1.285
Step-by-step explanation:
We are given the following information in the question:
Mean, μ = 17.6 seconds
Standard Deviation, σ = 2.1 seconds
Formula:
For x = 14.9, we have:
A z-score to be unusual if its z-score is less than -2.00 or greater than 2.00.
Thus, the z-score is not unusual as it lies in the range [-2.00, 2.00]