Suppose ARB Bank is reviewing its service charges and interest payment policies on current accounts. Suppose further that ARB has found that the avcrage daily bulance on personal current accounts is GHl¢350.00, with a standard deviation of GH¢ 160.00. In addition, the average daily balances have been found to follow a normal distribution; (i) What percentage of customers carrics a balance of GHe 100 or lower? (ii) What percentage of customers carries a balance of Gll¢500 or lower?

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Suppose ARB Bank is reviewing its service charges and interest payment
policies on current accounts. Suppose further that ARB has found that the
avcrage daily bulance on personal current accounts is GHl¢350.00, with a
standard deviation of GH¢ 160.00. In addition, the average daily balances have
been found to follow a normal distribution;
(i) What percentage of customers carrics a balance of GHe 100 or lower?
(ii) What percentage of customers carries a balance of Gll¢500 or lower?
Transcribed Image Text:Suppose ARB Bank is reviewing its service charges and interest payment policies on current accounts. Suppose further that ARB has found that the avcrage daily bulance on personal current accounts is GHl¢350.00, with a standard deviation of GH¢ 160.00. In addition, the average daily balances have been found to follow a normal distribution; (i) What percentage of customers carrics a balance of GHe 100 or lower? (ii) What percentage of customers carries a balance of Gll¢500 or lower?
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