The average of all of them is the same as the average of the first and last, the same as the middle number in the group:
1 + n
Answer:
Probability = 1/5
Step-by-step explanation:
Total ways of arrangement for 10 students = 10 !
Ways to arrange 2 students consecutively & other 8 students = 9 ! x 2
( As 9! to arrange 9 units, as 2 considered together ; & 2 for arranging 2 consecutive students - respectively )
So, Probability = Favourable outcomes / Total outcomes
= ( 2 x 9! ) / 10! = ( 2 x 9 x 8 x ..... 2 x 1 ) / 10 x 9 x ....... 2 x 1)
= 2 / 10 = 1/5
Answer:
A. 6/9 B. 2/12
Step-by-step explanation:
Answer:
7x^2 -x -5
Step-by-step explanation:
(8x^2 - 2x) - (x^2 - x + 5)
Distribute the minus sign
(8x^2 - 2x) - x^2 + x - 5
Combine like terms
7x^2 -x -5
Answer:
12 Nickles
6 dimes
Step-by-step explanation:
yeah bro i think thats the answe
