A producer of soft drinks was fairly certain that her brand had a 15% share of the soft drink market. In a market survey involving 3000 consumer of soft drinks, 250 expressed a preference for her brand. If the 15% figure is correct, find the probability of observing 400 or more consumers who prefer her brand of soft drink. [Hint: Use normal approximation and z-value must be rounded-off to 2 decimal places only

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