The mean is and standard deviation is . Then the variable .
Use substitution , then the variable .
The probability can be calculated in the following way:
for X=80, and . From the diagram .
Conclusion: if 188 students take the exam, then 188·0.84=157.92 (157) would receive a score above 80
Answer:
It's linear
Step-by-step explanation:
answer is 24
out of 45,
24+10=singing
only 24=dancing
so 24 girls joined both
it is a 90 degree angle
because the little square in the corner