Answer: 2718
Step-by-step explanation:
Given: Mean score = 85
Standard deviation = 5
Let x be the score of a random student that follows normal distribution.
Then, the probability that a student scored between 90 and 95 will be
The number of students scored between 90 and 95 = 0.1359 x (Total students)
= 0.1359 (20000)
= 2718
Hence, The number of students scored between 90 and 95 = 2718
A=4πr^2 or in other words 4(3.14)r^2 (^2 stands for squared)
8=12-8x
-4=8x
-4÷8=8x÷8
-0.5=x
Answer:
He made Rs.500
He gave Rs.250 to the orphanage
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