Answer:20÷100×23
Step-by-step explanation:
20 percent is 20÷100 and to find 20 percent of 230 we have to multiply 20 percent by 2
The standard deviation for this binomial distribution is 6.1.
Since it's a binomial distribution, the standard deviation will be given as thus:
Standard deviation = √ (n × p × q)
where,
p = probability of success = 20% = 0.2
q = probability of failure = (1-p) = 1 - 0.2 = 0.8
n = total population = 230
Then, we'll put the values in the formula and this will be:
= (n × p × q)
= √(230 × 0.2 × 0.8)
= √36.8
= 6.1
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