**1.Given 100 to 999 nos. Probability of picking a no. with out digit 7.**

Ans. 18/25.

**2. Ten film rolls. 3 defective, prob. of picking up 2 defective rolls with out replacement**

Ans. 6/90

**3. The purpose of hashing is :**

Ans. O(1) complexity

**4. In 1978, a kg of paper was sold at Rs25/-. I f the paper rate increases at 1.5% more than inflation rate which is of 6.5% a year , then what wil be the cost of a kg of paper after 2 years?**

a)29.12 (b) 29.72 (c) 30.12 (d) 32.65 (e) none of these

**5. In A,B,C are having some marbles with each of them. A has giben B and C the same number of marbles they already have to each of them. then, B gave C and A the same no. of marbles they have, then C gave A and B the same no. of marbles they have. At the end A,B,and C have equal no. of marbles.**

**(i) If x,y,z are the marbles initially with A,B,C respectively. then the no of marbles B have at the end**

**(a) 2(x-y-z) (b) 4(x-y-z) etc.**

**(ii)If the total no. of marbles are 72, then the no. of marbles with A at the starting**

a. 20 b. 30 c. 32

**6) person has Rs 100/- in his pocket, he can as 25 pencils or 15books. He kept 15% of the money for travelling expenses and purchased 5ncils.So how many books he can purchase with the remaining money.A boy multiplied a number with 10 and got 100,insted of dividing it . If he devided it what would be the answer?**

**Ans: 1**

**7)If 12 shell cup board requires 18ft of wall space then30 .how much wall space?**

Ans : 45

**8)The average salary of three employee is 95Rs.per week. If one employee earns 115 and other earns 65 rupees.how much will third be earn?**

Ans : 105Rs

**9)A company instaled 36 punching machines at the begining of the year.In the spring they instaled 9 additional m/c’s and then discontinued 18 in the fall.How many were still installed at the end of the year?**

Ans: 9

**10)During a given week a programmer spend 1/4 of his time preparing charts,3/8 of his time for coding,rest of his timefor debugging the programs.If he had 48 hrs during the week how many hours did he spend debugging the program.**

Ans :18hrs

**11)A 16 story building has 12000ft on each floor. Company A rents 7 floors and company B rents 4 floors. What is the number of square feet of unrented floor space?**

Ans : 60000 sqft

**12)A man owns 2/3 of a computer service buroue business and sells 3/4 of his share for $75000.What is the value of the business.**

Ans :150,000

**13)A computer printer produces 176400 lines in a given day. If the printer was in operation for 7hrs during the day how many lines did it print per minute?**

Ans : 420

**14)From its total income a company spent $20000 for advertising half of the remainder on salaries and had $6000 left.What was the total income?**

Ans : $32000

**15)In a certain company 20% of the men and 40% of the women attended the annual company picnic.If 35% of all the employees are men .What % of all the employee went to the picnic?**

Ans : 33%