It would be the fourth answer -6(2)=-13 I think
Answer:
Total number of cards in a standard deck of card=52
As deck of card contain 13 club +13 heart +13 spade+13 Diamond.
P(Diamond)=13/52 =1/4
If the card is not diamond then
P(not diamond)=39/52=3/4
Since after drawing card is not replaced
P ( second Diamond)=12/51
now if second card is not Diamond.then
P(non diamond)=39/51
Chances of your winning i.e both cards are diamonds=1/4×12/51=1/17=0.0588..(approx)
chances of your friend winning=1/4×39/51=[1/4]×[13/17]=13/68=0.1911..(approx)
Your friend has got better chance to win because there are more chances that both the cards are not Diamonds.
26 because if you use the formula (x+y)/2 which makes it halfway in between.
The answer is the option A.
dy dy dx
---- = ------- . -------
dt dx dt
dy
---- = 9x^2 + 6
dx
dx
---- = 4t + 1
dt
=> dy / dt = (9x^2 + 6) (4t + 1)
