Thirty percent of the members of a swimming club have passed the lifesaving test. Among the members who have not passed the test, 12 have taken the preparatory course and 30 have not. How many members are there in the swimming club?
A. 80
B. 60
C. 100
D. 120
E. None of these
Explanation: 30% পাশ করলে পাশ করেনি = \((100 - 30)\)% = 70%. \(70\% = 12 + 30 = 42\) জন; অর্থাৎ \(100\% = \frac{42}{70} \times 100 = 60\) জন।
Related Questions (Any University/Year)
- In a library system with 6 brances, 60 workers are employed. If no library has fewer than 7 workers and ne more then 11, what is the minimum number of workers in any two of the brances?
- BG Mawla drove for h hours at a constant rate of r miles per hour. How many miles did he during the final 20 minutes for his drive?
- Sum of present ages of father & son is 70. 7 yrs ago, ratio was 5:2. Ratio after 5 yrs?
- On a certai project, the only grades awarded were 745 and 100. If 85 students completed the projects and the average of their grades was 85, how many of them did score 100?
- Lima is 6 years older than her sister Sharmin, and Jamal is 5 years older than Lima. If the total of their ages is 41, how old is Jamal?
- ১৯৯৯ সালে, ডায়ানা ১০টি ইংরেজি বই এবং ৭টি ফরাসি বই পড়েছিলেন। ২০০০ সালে তিনি ইংরেজি বইয়ের চেয়ে দ্বিগুণ ফরাসি বই পড়েন। দুই বছরে তিনি যে বইগুলো পড়েছিলেন তার ৬০% যদি ফরাসি হয়, তাহলে ২০০০ সালে তিনি কতগুলো বই পড়েছিলেন?
- Anwar is 3 times as old as Babu. In 13 years, Anwar will be 1 year younger than twice Babu's age. How old is Anwar now?
- A salesman makes a 20 percent commission on the selling price of each set of encyclopedias he sells. If he sells 12 identical sets of encyclopedias and makes $1,800 in commissions, what is the selling price of each set?
- ৫০ পয়সা ১০০ টাকার কত ভগ্নাংশ?
- If it takes 5 minutes to boil an egg, how much time it will take to boil 10 eggs?
- If Masud can do a job in P days, while Minhaz can do the same job in Q days separately, how long will it take to finish the job if they work together?
- Three workers P. Q. R can do a certain job at their own rate separately. If X represents the ratio of the work-speed of P and R, and Y represents the ratio of the work-speed of Q and R. such that \(X < Y\) and \(Y < 1\), who is the fastest worker of the three?
- If a man's weekly salary is Tk. P and he saves Tk. M, what faction of his weekly salary does he spend?
- The difference of the squares of two consecutive odd numbers is 84. What is the sum of the two numbers?
- Asif Is now 14 years older than Saif. If in 10 years Asif will be twice as old as Saif. How old will Asif be in 7 years?
- On a 400 mile trip ,car X traveled half the distance at 40 miles per hour and the other half at 50 miles per hour .What was the average speed of car X?
- What is 10% of of 20% of 30%?
- A husband and wife have six married sons . Each of them has four children . The total number in the family is :
- Lima can do a job in 6 hours. If Sima works with her, the job will be completed in 2 hours. How many minutes would it take Sima to do the job alone?
- The sum of the ages of 4 children born at the intervals of 3 years each is 42 years. What is the age of the youngest child?