1/7 is your answer. It can't be reduced any further. If there is supposed to be a problem, next time, add it.
Given: 12x +20
factor out a two: 2(6x +10)
factor out a four: 4(3x+5)
factor out 3/4: 3/4(9x +15)
factor out 1/2: 1/2(6x +10)
Hint: think of Multiples of 12 and 20
Hope this helps!
Your chance of winning the first prize will be 2 in 30 which is 2/30 x 100 = 6.6%, your friend’s chances of winning the second prize will be 5 in 28 which us 5/28 x 100 = 17.8%
Its a 39 difference 206-167= 39
Answer:
You have three card : 3, 4, 5 and 6.
You first pick one card randomly, the probability of picking a 3 is:
P = 1/4
You then pick a second card without putting the first card back, the probability of picking a 3 is:
P = 1/3
=> The probability of picking a 3 and then picking a 3:
P = (1/4) x (1/3) = 1/12
Hope this helps!
:)
