Since the students are to be selected at random, the concept used is Combination. The combination is 20C7 which means that "combination of 20 taken 7". The numerical value of the combination is 77520. Thus, there are 77520 ways of choosing the members of the student council.
The equivalent limit of the function as x tends to zero is -1/2
Given the limit of a function:
Taking the limit of the function as x tends to zero
Applying the L'hospital rule will give:
Applying the l'hospital rule the second time:
Hence the equivalent limit of the function as x tends to zero is -1/2
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Answer:
The probability of a bulb lasting for between 480 and 526 hours=0.74454
Step-by-step explanation:
We are given that
Standard deviation of the lifetime,hours
Mean, hours
We have to find the probability of a bulb lasting for between 480 and 526 hours.
Hence, the probability of a bulb lasting for between 480 and 526 hours=0.74454
Answer:
{(3, 5), (2, 5), (3,8)}
Step-by-step explanation:
separate the x's & y's & put them in separate brackets
The total no. of books in the school library= 980
<u>Step-by-step explanation:</u>
Let the total no. of books be 'n'
60% of total books are text books
No. of text books = 588
(60/100) x n = 588
n = 588 x (100/60)
n = 980
The total no. of books in the school library= 980