The captain of Bangladesh Cricket Team is 26 years old and the wicket keeper is 4 years older. If the ages of these two are excluded, the average age of the remaining players is one year less than the average age of the whole team. What is the average age of the team?
A
21
B
22
C
23
D
None
উত্তরের বিবরণ
ধরি, দলের গড় বয়স x
তাহলে দলের মোট বয়স 11x (যেহেতু টিমে খেলোয়াড় থাকে এগারোজন)
দেওয়া আছে, ক্যাপ্টেনের বয়স 26 বছর
এবং উইকেট কিপারের বয়স 26+4 = 30 বছর
তাহলে তাদেরকে ছাড়া দলের গড় বয়স {11x - (26+30)}/9
প্রশ্নমতে, (11x - 56)/9 = x - 1
বা, 11x - 56= 9x - 9
বা, 2x = 47
বা, x = 47/2=23.5
সুতরাং উত্তর উপরের কোনো অপশনে নেই।
0
Updated: 17 hours ago
There are 48 books on 3 shelves. If 3 books from third shelf are shifted to the second there will be same number of books on first and third shelves and double the number of books on second shelf. How many books were there on three shelves originally?
Created: 17 hours ago
A
10, 25,13
B
12, 21,15
C
11, 23, 14
D
13, 19, 16
Suppose, the first shelf had x books.
So, the third shelf had x+3 books.
And the second shelf had 2x-3 books.
According to the question,
x + x+3 + 2x-3 = 48
4x = 48
x = 12
1st shelf = 12, 2nd shelf = 2×12-3 = 21, 3rd shelf = 12+3 = 15.
0
Updated: 17 hours ago
150 individuals attended a marathon held in Sylhet. Of those only If x of the 150 individuals were from sythet and z of the individuals participated in the marathon but were not from sylhet. Which of the following represents the number of individuals who did not participate in the marathon and were not from sylhet?
Created: 17 hours ago
A
150-x+z
B
150-x-y+z
C
150-x+z
D
150-x- z
Total = 150
Total ''From-Sylhet'' = x
Total ''Not-from-Sylhet'' = 150-x
Participated & ''Not-from-Sylhet'' = z
Didn't participate & ''Not-from-Sylhet'' = 150-x -z
0
Updated: 17 hours ago
i-49 এর মান কত?
Created: 1 month ago
A
-1
B
i
C
1
D
-i
আমরা জানি, i = √-1;i2= -1; i3 = i2i = -i; i4 = i2.i2 = (-1).(-1) = 1 i-49= 1/i49= 1/{i48.i}= 1/{(i4)12.i}= 1/i= i4/i= i3= -i
0
Updated: 1 month ago
