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vladimir1956 [14]
3 years ago
13

Find the probability that when a couple has sixsix ​children, at least one of them is a girlgirl. ​(assume that boys and girls a

re equally​ likely.)
Mathematics
1 answer:
Vaselesa [24]3 years ago
6 0

Answer: \frac{63}{64}

<u>Step-by-step explanation:</u>

"At least one" means:

(1g & 5b) or (2g & 4b) or (3g & 3b) or (4g & 2b) or (5g & 1b) or (6g & 0b)

which is the same as: not(0g & 6b)

<u>not (0g & 6b)</u>

= 1 - [(\frac{1}{2})^{0}*(\frac{1}{2})^{6} ]

= 1 - 1 * \frac{1}{64}

= 1 - \frac{1}{64}

= \frac{63}{64}

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1/2+1/4+1/8 what is this
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2 years ago
4 5/6+3/5= my daughter is needing help she's in the 5th grade
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3 years ago
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A computer system is priced at $3200. A man buys
max2010maxim [7]

(i) Monthly installment is $21.53 approximately.

(ii) Total amount man has to pay is $3716.8

(iii) Extra money he had to pay for buying the computer on hire is $516.8

Given,

Initial price of the computer(p) = $3200

Down payment = $480

Time period = 2 yrs

rate percent = 9.5%

(i) Monthly installment = ?

monthly installment =(capital amount × interest rate)/time in months

down payment to be paid = 3200 ₋ 480

                                         = 2720

therefore, monthly payment = 2720 × 9.5 × 1/ 12

                                            = $21.53

(ii) Total amount man has to pay = ?

                                           = down payment ₊ remaining amount ₊                                                                                                                                                 (remaining amount × t × r)                                          

                                           = 480 ₊ 2720 ₊ 2720 × 9.5 × 2

                                           = $3716.8

(iii) If he buys the computer on hire then how much more he has to pay = ?

= total amount ₋ initial cost

= 3716.8 ₋ 3200

= $516.8

Hence the man has to pay $21.23 as a monthly installment, $3716.8 as a total cost of the computer system and $516.8 as an extra amount if he buys it on hire.

Learn more about "Interest rate problems" here-

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