Boyo234

http://img233.imageshack.us/i/jhgfrde.jpg/

Can somebody explain why going from the 2nd line to the 3rd line, the top line becomes negative?

In quality control negotiations between a large supermarket chain and a straw-

berry producer, it is provisionally agreed that samples of 100 strawberries

will be picked at random from delivered consignments and if more that two

have developed mould, the entire delivery will be rejected. The producer

knows, from past experience, that about 1% of a consignment will be mouldy

but wants to know the probability of such an consignment being rejected.

Determine that probability. [3]

(c) Determine also the supermarket’s risk of accepting a consignment with 5%

defective strawberries. [3]

Hint: use the Poisson approximation to the Binomial distribution.

B2. (a) State the mean of a continuous exponential distribution whose probability

density function is f(t) = je^−jt, t > 0. [2]

(b) The shelf life (time to detectable spoilage) of a certain type of cartons of blue-

berries has been found, from past experience, to be exponentially distributed

with a mean of 10 days. Calculate the probability of a carton spoiling

(i) during the tenth day

(i.e. in the 24 hours after the midnight of the ninth day); [4]

(ii) some time after the end of the fourteenth day; [2]

(iii) within the first five days of display

(i.e. up to the end of the fifth day). [2]

Hint: take j = 1/X, where X is an appropriate random variable.

/

A2. A hand of bridge consists of 13 cards from a standard 52 card deck. Find the

probability that a bridge hand contains:

(a) 2 kings and 2 queens,

(b) at least 3 kings,

(c) at least one king or queen.

NB. There are 4 kings and 4 queens in a standard deck of cards.

I'm using WinSCP to add applications to my ipod touch, but part of the instructuons is

"Copy the .app file into //applications and CHMOD it to 775"

and another bit tells me to CHMOD a folder to 777. How do i do this?

I just recently bought an Ipod Touch, and have since upgraded to the latest firmware. If i was to jailbreak it now, can i still add songs to it from my itunes?

Please Explain to me how to do this past paper question, as i have 54% Of My Gcse on Thursday and thr other 46% Next monday =\

1. Find The Values of "c" and "d" for which

ysquared - 12y +c = (y +d)squared