Ashifur August 8, 2023 - 14:32
Problem: ক,খ ও গ এর বয়সের গড় ২৫ বছর এবং ক, খ, গ ও ঘ এর বয়সের গড় ২৭ বছর । তাহলে ঘ এর বয়স কত?

View all: BANGLADESH BANK BANKERS(AD) | WRITTEN QUESTION (MATH) SOLVE | 1990

Correct Answer: উত্তরঃ ঘ এর বয়স ৩৩ বছর ।

Explanation:

দেওয়া আছে, ক +খ+গ+ঘ এর বয়সের গড় =২৭ বছর

ক+খ+গ+ঘ বয়সের সমষ্টি ২৭ $\times$৪ =১০৮ বছর

আবার, ক, খ ও গ এর বয়সের গড় =২৫ বছর

ক,খ ও গ এর বয়সের সমষ্টি ২৫ $\times$ ৩ বছর=৭৫ বছর

ক+খ+গ+ঘ বয়সের সমষ্টি ২৭ $\times$৪ =১০৮ বছর

ক,খ ও গ এর বয়সের সমষ্টি =৭৫ বছর

ঘ এর বয়স=৩৩ বছর ।

Write Reply...
You should read | Topics/Questions
A box contains 75 rods; 35 are blue and  and 25 of those blue rods are twisted at the \bottom.  the rest them are red and 30 of the red ones are clear. What is the and probability of drawing?
Karim and Rahim have equal amount of money. Rumana has half of Rahim’s money and Amena has half of Rumana’s money. If you add one Taka with all the money they have, it will be Tk. 100. How much money Rahim has?
A garden is 60 meter long and 20 meter wide. Inside the garden there is a 5 meter wide path around it. What is the area of the path in square meter?
 A manufacturing company uses two machines A and B with different production 1 capacities. When working alone, machine A can-produce a production lot in 5 hours and machine B can produce the same lot in x hours. When the two machines operate simultaneously to produce the same production lot, it takes them 2 hours to complete the job. How many hours will the machine B take to produce the production lot alone?
At 9.00 a.m., the “Titas Express” \left the station heading South. Two hours later, the train “Surma Express” \left the same station on a parallel track in the same direction. “Titas” speed average 60 kilometers per hour for the first hour and then averaged 50 kilometers per hour for the rest of the trip. Meanwhile, Surma‘s speed averaged 75 kilometers per hour throughout the trip. At what time did Surrna pass Titas?
A can dig a pond in 30 days and B can dig the same pond in 20 days. In how many days A and B can dig the pond if they work together?
Mr. X pays 10% tax on all income over Tk. 60,000, but he does not pay any tax on interest on postal savings certificate. In 2000 he paid Tk. 7,500 as tax and he earned Tk. 12,000 as interest on postal savings account. What was net income in 2000?
In 2005, the number of pairs of the shoes that a company sold to retailers decreased by 20 percent, while the price per pair increased by 20 percent from that of the previous year. The company’s revenue from the sales of the shoes in 2005 was Tk 300,000. What was the revenue from the sale of the shoes in the previous year?
The difference between two numbers is five and the difference between their squares is 65. What is the larger number?
Average mark obtained by 100 students in a class is 85. When 10% of the students are excluded from the group, the average mark of remaining students is 90. Find average mark of the 10% of students excluded for the group.
User Avatar

Articles

0

Comments

0

Rating

0

Login