iPhones are manufactured in by batches. Per batch, there are 100 iPhones. a sample of 10 iPhones are used to screen for quality control. If more than 3 iphones have software issues then it is sent back to the manufacturing. If more than 1 iphone have hardware issue then it is sent back to manufacturing. If a batch contains 3 iphones that has hardware issue and 6 iphones with software issues. What is the probability that it will be sent back to manufacturing

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