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  • µî·ÏÀÏ 2024-06-19 13:08
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20% È®·ü·Î ´ç÷À̶ó¸é

5°³ »ÌÀ¸¸é ÃÖ¼Ò 1°³´Â ´ç÷ µÇ´Â°Å ¾Æ´Ñ°¡...??

 

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°¢°¢ 20%(¶Ç´Â 0.2)ÀÇ ´ç÷ È®·üÀ» °¡Áø 5ÀåÀÇ º¹±ÇÀ» Ãß÷ÇÒ ¶§ 

Àû¾îµµ ÇϳªÀÇ »óÇ°¿¡ ´ç÷µÉ È®·üÀ» °è»êÇϱâ À§ÇØ º¸¼ö ±ÔÄ¢À» »ç¿ëÇÒ ¼ö ÀÖ½À´Ï´Ù. 

º¸¼ö ¹ýÄ¢Àº ¾î¶² »ç°ÇÀÌ Àû¾îµµ ÇÑ ¹ø ÀϾ È®·üÀº 

1¿¡¼­ »ç°ÇÀÌ ÀüÇô ÀϾÁö ¾ÊÀ» È®·üÀ» »« °Í°ú °°´Ù°í ¸»ÇÕ´Ï´Ù.



´Ü ÇÑ ÀåÀÇ Æ¼Äϵµ ´ç÷µÇÁö ¾ÊÀ» È®·ü:

 

´ÜÀÏ Æ¼ÄÏÀ¸·Î ´ç÷µÇÁö ¾ÊÀ» È®·üÀº 1−0.2=0.81 - 0.2 = 0.81−0.2=0.8ÀÔ´Ï´Ù.




ƼÄÏ 5Àå ¸ðµÎ ´ç÷µÇÁö ¾ÊÀ» È®·ü:


5ÀåÀÇ Æ¼ÄÏÀÌ ¸ðµÎ ´ç÷µÇÁö ¾ÊÀ» È®·üÀº 0.850.8^50.85ÀÔ´Ï´Ù.




ÃÖ¼Ò 1ÀåÀÇ Æ¼ÄÏ¿¡ ´ç÷µÉ È®·ü:


ÃÖ¼Ò 1ÀåÀÇ Æ¼ÄÏ¿¡ ´ç÷µÉ È®·üÀº 1−0.851 - 0.8^51−0.85ÀÔ´Ï´Ù.



Now, let's calculate 0.850.8^5 :

 

 0.85=0.8¡¿0.8¡¿0.8¡¿0.8¡¿0.80.8^5 = 0.8 \times 0.8 \times 0.8 \times 0.8 \times 0.8

 

0.85=0.327680.8^5 = 0.32768

Therefore,

Probability of winning at least one ticket=10.32768=0.67232\text{Probability of winning at least one ticket} = 1 - 0.32768 = 0.67232

So, the probability of winning at least one prize when drawing 5 lottery tickets, each with a 20% chance of winning, is approximately 0.672320.67232 or 67.23%67.23\%.

 

 

 

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20%ÀÇ È®·ü·Î ´ç÷µÇ´Â º¹±ÇÀ» 

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