Solve any three of the following.
(1) Ifa and ß are the roots of the quadratice equation x2 - 2x - 70, find the
value a? + B?
(2) How many of the three digit natural numbers are divisible by 5?
(3) The following table shows the investment made by some families. Show
the information by a histogran.
Investment
(Thousand Rupees)
No. of families 30 50 60 55 15
(4) A two digit number is to be formed from the digits 0,1,2,3,4,
without repetition of the digits. Find the probability that the number so
formed is a prime number
10-15 15-20 20-25 25-30 | 30-35
Answers
Answered by
2
1st one....The answer can be found out by using the formula of discriminant.
2nd one by using formula of AP GP
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