Each of five questions on a multiple-choice examination has four choices, only one of which is correct. The student is attempting to guess the answers. The random variable X is the number of questions answer correctly. Probability that the student will get

Exactly three correct answers

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#Question id: 1866

#Section 2: General Biology

What does HIV binds to?

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#Question id: 1867

#Section 2: General Biology

Which of the following is a coreceptor for HIV?

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#Question id: 1868

#Section 2: General Biology

Which of the following is NOT helpful in the diagnosis of AIDS?

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#Question id: 1869

#Section 2: General Biology

Which of the following HIV antigens provides a potential target for neutralizing antibody?

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#Question id: 1870

#Section 2: General Biology

Primary immunodeficiency producing susceptibility to infection by viruses and molds is caused by:

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#Question id: 1871

#Section 2: General Biology

Deletions in the T-cell CD154 (CD40L) gene produce: