There are two names given JOHNSON and TONY. If one letter is picked from both simultaneously at random, then find the probability that the letter is same? JOHNSON = 2/7 (if I pick O) TONY= ¼ (if I pick O) Total probability of picking O = 2/7 + ¼ JOHNSON = 2/7( if I pick…

# Category: Mathematics

## Question 4

If in a team of 100, 70 liked cricket, 80 liked football and 5 liked neither, then how many people did like cricket but not football? C-N= 70-N F-N=80-N 70-N+N+80-N+5=100 155-N=100 N=155-100 N=55 C-N=70-55 =15 Answer: 15 For details, see the video https://youtu.be/b6lbcfMcaF4

## Question 3

Count the positive factors of xpyqzr. positive factors = (p+1)+(q+1)+(r+1) positive factors of 253675 = (5+1)+(6+1)+(5+1) = 6+7+6= 19 Task: Count the positive factors of 72560 For details, see the video https://youtu.be/b6lbcfMcaF4

## Question 2

Given a sequence 2, x, 7……. Which contains a constant such that the number is obtained by adding the previous number and the constant. Find x. Constant = c x= 2+c——(1) 7=x+c——-(2) (1)-(2) x-7=2+c-x-c x+x=2+7 2x=9 x=9/2(Answer) (1)—- 9/2-2=c c= (9-4)/2 c=5/2 2, (2+ 5/2), ( 2+5/2 + 5/2)= 7 …………. For details, see the…

## Question 1

If ‘x’ is the unit digit of pq, what is the value of x? p and q will be given to you. Number: pq p q 120 650 12561 345 122 556 243 329 124 7777 1245 89782 1246 234 1247 124 1248 25 1249 45 45/2=22 45%2=1 Unit digit(m) Unit digit produced from power(n)…